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36 vulnerabilities found for backstage by linuxfoundation

CVE-2026-32237 (GCVE-0-2026-32237)

Vulnerability from nvd – Published: 2026-03-12 18:38 – Updated: 2026-03-12 20:46
VLAI
Title
@backstage/plugin-scaffolder-backend: Possible exposure of defaultEnvironment secrets using dry-run endpoint
Summary
Backstage is an open framework for building developer portals. Prior to 3.1.5, authenticated users with permission to execute scaffolder dry-runs can gain access to server-configured environment secrets through the dry-run API response. Secrets are properly redacted in log output but not in all parts of the response payload. Deployments that have configured scaffolder.defaultEnvironment.secrets are affected. This is patched in @backstage/plugin-scaffolder-backend version 3.1.5.
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
Show details on NVD website

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CVE-2026-32236 (GCVE-0-2026-32236)

Vulnerability from nvd – Published: 2026-03-12 18:37 – Updated: 2026-04-15 20:46
VLAI
Title
@backstage/plugin-auth-backend: SSRF in experimental CIMD metadata fetch
Summary
Backstage is an open framework for building developer portals. Prior to 0.27.1, a Server-Side Request Forgery (SSRF) vulnerability exists in @backstage/plugin-auth-backend when auth.experimentalClientIdMetadataDocuments.enabled is set to true. The CIMD metadata fetch validates the initial client_id hostname against private IP ranges but does not apply the same validation after HTTP redirects. The practical impact is limited. The attacker cannot read the response body from the internal request, cannot control request headers or method, and the feature must be explicitly enabled via an experimental flag that is off by default. Deployments that restrict allowedClientIdPatterns to specific trusted domains are not affected. Patched in @backstage/plugin-auth-backend version 0.27.1.
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Show details on NVD website

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CVE-2026-32235 (GCVE-0-2026-32235)

Vulnerability from nvd – Published: 2026-03-12 18:35 – Updated: 2026-03-12 20:46
VLAI
Title
@backstage/plugin-auth-backend: OAuth redirect URI allowlist bypass
Summary
Backstage is an open framework for building developer portals. Prior to 0.27.1, the experimental OIDC provider in @backstage/plugin-auth-backend is vulnerable to a redirect URI allowlist bypass. Instances that have enabled experimental Dynamic Client Registration or Client ID Metadata Documents and configured allowedRedirectUriPatterns are affected. A specially crafted redirect URI can pass the allowlist validation while resolving to an attacker-controlled host. If a victim approves the resulting OAuth consent request, their authorization code is sent to the attacker, who can exchange it for a valid access token. This requires victim interaction and that one of the experimental features is explicitly enabled, which is not the default. This vulnerability is fixed in 0.27.1.
CWE
  • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
Impacted products
Show details on NVD website

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CVE-2026-25152 (GCVE-0-2026-25152)

Vulnerability from nvd – Published: 2026-01-30 21:51 – Updated: 2026-02-02 16:29
VLAI
Title
@backstage/plugin-techdocs-node vulnerable to possible Path Traversal in TechDocs Local Generator
Summary
Backstage is an open framework for building developer portals, and @backstage/plugin-techdocs-node provides common node.js functionalities for TechDocs. In versions of @backstage/plugin-techdocs-node prior to 1.13.11 and 1.14.1, a path traversal vulnerability in the TechDocs local generator allows attackers to read arbitrary files from the host filesystem when Backstage is configured with `techdocs.generator.runIn: local`. When processing documentation from untrusted sources, symlinks within the docs directory are followed by MkDocs during the build process. File contents are embedded into generated HTML and exposed to users who can view the documentation. This vulnerability is fixed in` @backstage/plugin-techdocs-node` versions 1.13.11 and 1.14.1. Some workarounds are available. Switch to `runIn: docker` in `app-config.yaml` and/or restrict write access to TechDocs source repositories to trusted users only.
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
Vendor Product Version
backstage backstage Affected: < 1.13.11
Affected: = 1.14.0
Create a notification for this product.
Show details on NVD website

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CVE-2026-25153 (GCVE-0-2026-25153)

Vulnerability from nvd – Published: 2026-01-30 21:31 – Updated: 2026-02-02 16:29
VLAI
Title
@backstage/plugin-techdocs-node vulnerable to arbitrary code execution via MkDocs hooks
Summary
Backstage is an open framework for building developer portals, and @backstage/plugin-techdocs-node provides common node.js functionalities for TechDocs. In versions of @backstage/plugin-techdocs-node prior to 1.13.11 and 1.14.1, when TechDocs is configured with `runIn: local`, a malicious actor who can submit or modify a repository's `mkdocs.yml` file can execute arbitrary Python code on the TechDocs build server via MkDocs hooks configuration. @backstage/plugin-techdocs-node versions 1.13.11 and 1.14.1 contain a fix. The fix introduces an allowlist of supported MkDocs configuration keys. Unsupported configuration keys (including `hooks`) are now removed from `mkdocs.yml` before running the generator, with a warning logged to indicate which keys were removed. Users of `@techdocs/cli` should also upgrade to the latest version, which includes the fixed `@backstage/plugin-techdocs-node` dependency. Some workarounds are available. Configure TechDocs with `runIn: docker` instead of `runIn: local` to provide container isolation, though it does not fully mitigate the risk. Limit who can modify `mkdocs.yml` files in repositories that TechDocs processes; only allow trusted contributors. Implement PR review requirements for changes to `mkdocs.yml` files to detect malicious `hooks` configurations before they are merged. Use MkDocs < 1.4.0 (e.g., 1.3.1) which does not support hooks. Note: This may limit access to newer MkDocs features. Building documentation in CI/CD pipelines using `@techdocs/cli` does not mitigate this vulnerability, as the CLI uses the same vulnerable `@backstage/plugin-techdocs-node` package.
CWE
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
Impacted products
Vendor Product Version
backstage backstage Affected: < 1.13.11
Affected: = 1.14.0
Create a notification for this product.
Show details on NVD website

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CVE-2024-45815 (GCVE-0-2024-45815)

Vulnerability from nvd – Published: 2024-09-17 20:14 – Updated: 2024-09-18 14:49
VLAI
Title
Prototype pollution in @backstage/plugin-catalog-backend
Summary
Backstage is an open framework for building developer portals. A malicious actor with authenticated access to a Backstage instance with the catalog backend plugin installed is able to interrupt the service using a specially crafted query to the catalog API. This has been fixed in the `1.26.0` release of the `@backstage/plugin-catalog-backend`. All users are advised to upgrade. There are no known workarounds for this vulnerability.
CWE
  • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
Impacted products
Vendor Product Version
backstage backstage Affected: < 1.26.0
Create a notification for this product.
Show details on NVD website

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CVE-2024-45816 (GCVE-0-2024-45816)

Vulnerability from nvd – Published: 2024-09-17 20:13 – Updated: 2024-09-18 14:50
VLAI
Title
Storage bucket Directory Traversal in @backstage/plugin-techdocs-backend
Summary
Backstage is an open framework for building developer portals. When using the AWS S3 or GCS storage provider for TechDocs it is possible to access content in the entire storage bucket. This can leak contents of the bucket that are not intended to be accessible, as well as bypass permission checks in Backstage. This has been fixed in the 1.10.13 release of the `@backstage/plugin-techdocs-backend` package. All users are advised to upgrade. There are no known workarounds for this vulnerability.
CWE
  • CWE-23 - Relative Path Traversal
Assigner
References
Impacted products
Vendor Product Version
backstage backstage Affected: < 1.10.13
Create a notification for this product.
Show details on NVD website

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CVE-2024-46976 (GCVE-0-2024-46976)

Vulnerability from nvd – Published: 2024-09-17 20:12 – Updated: 2024-09-18 13:47
VLAI
Title
Circumvention of cross site scripting Protection in @backstage/plugin-techdocs-backend
Summary
Backstage is an open framework for building developer portals. An attacker with control of the contents of the TechDocs storage buckets is able to inject executable scripts in the TechDocs content that will be executed in the victim's browser when browsing documentation or navigating to an attacker provided link. This has been fixed in the 1.10.13 release of the `@backstage/plugin-techdocs-backend` package. users are advised to upgrade. There are no known workarounds for this vulnerability.
CWE
  • CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
Vendor Product Version
backstage backstage Affected: < 1.10.13
Create a notification for this product.
Show details on NVD website

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CVE-2023-6944 (GCVE-0-2023-6944)

Vulnerability from nvd – Published: 2024-01-04 10:02 – Updated: 2025-11-20 18:07
VLAI
Title
Rhdh: catalog-import function leaks credentials to frontend
Summary
A flaw was found in the Red Hat Developer Hub (RHDH). The catalog-import function leaks GitLab access tokens on the frontend when the base64 encoded GitLab token includes a newline at the end of the string. The sanitized error can display on the frontend, including the raw access token. Upon gaining access to this token and depending on permissions, an attacker could push malicious code to repositories, delete resources in Git, revoke or generate new keys, and sign code illegitimately.
CWE
  • CWE-209 - Generation of Error Message Containing Sensitive Information
Assigner
References
URL Tags
https://access.redhat.com/errata/RHBA-2024:5869 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2023-6944 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2255204 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat RHDH-1.1-RHEL-9 Unaffected: 1.1-107.1724038966 , < * (rpm)
    cpe:/a:redhat:rhdh:1.1::el9
Create a notification for this product.
Date Public
2023-12-19 00:00
Credits
Red Hat would like to thank Josephine Pfeiffer for reporting this issue.
Show details on NVD website

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CVE-2023-35926 (GCVE-0-2023-35926)

Vulnerability from nvd – Published: 2023-06-22 13:29 – Updated: 2024-12-05 17:48
VLAI
Title
Insecure sandbox in Backstage Scaffolder plugin
Summary
Backstage is an open platform for building developer portals. The Backstage scaffolder-backend plugin uses a templating library that requires sandbox, as it by design allows for code injection. The library used for this sandbox so far has been `vm2`, but in light of several past vulnerabilities and existing vulnerabilities that may not have a fix, the plugin has switched to using a different sandbox library. A malicious actor with write access to a registered scaffolder template could manipulate the template in a way that allows for remote code execution on the scaffolder-backend instance. This was only exploitable in the template YAML definition itself and not by user input data. This is vulnerability is fixed in version 1.15.0 of `@backstage/plugin-scaffolder-backend`.
CWE
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
Impacted products
Vendor Product Version
backstage backstage Affected: < 1.15.0
Create a notification for this product.
Show details on NVD website

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CVE-2021-43783 (GCVE-0-2021-43783)

Vulnerability from nvd – Published: 2021-11-29 19:20 – Updated: 2024-08-04 04:03
VLAI
Title
Path Traversal in @backstage/plugin-scaffolder-backend
Summary
@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. In affected versions a malicious actor with write access to a registered scaffolder template is able to manipulate the template in a way that writes files to arbitrary paths on the scaffolder-backend host instance. This vulnerability can in some situation also be exploited through user input when executing a template, meaning you do not need write access to the templates. This method will not allow the attacker to control the contents of the injected file however, unless the template is also crafted in a specific way that gives control of the file contents. This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates.
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
Vendor Product Version
backstage backstage Affected: < 0.15.14
Create a notification for this product.
Show details on NVD website

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CVE-2026-32237 (GCVE-0-2026-32237)

Vulnerability from cvelistv5 – Published: 2026-03-12 18:38 – Updated: 2026-03-12 20:46
VLAI
Title
@backstage/plugin-scaffolder-backend: Possible exposure of defaultEnvironment secrets using dry-run endpoint
Summary
Backstage is an open framework for building developer portals. Prior to 3.1.5, authenticated users with permission to execute scaffolder dry-runs can gain access to server-configured environment secrets through the dry-run API response. Secrets are properly redacted in log output but not in all parts of the response payload. Deployments that have configured scaffolder.defaultEnvironment.secrets are affected. This is patched in @backstage/plugin-scaffolder-backend version 3.1.5.
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
Show details on NVD website

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CVE-2026-32236 (GCVE-0-2026-32236)

Vulnerability from cvelistv5 – Published: 2026-03-12 18:37 – Updated: 2026-04-15 20:46
VLAI
Title
@backstage/plugin-auth-backend: SSRF in experimental CIMD metadata fetch
Summary
Backstage is an open framework for building developer portals. Prior to 0.27.1, a Server-Side Request Forgery (SSRF) vulnerability exists in @backstage/plugin-auth-backend when auth.experimentalClientIdMetadataDocuments.enabled is set to true. The CIMD metadata fetch validates the initial client_id hostname against private IP ranges but does not apply the same validation after HTTP redirects. The practical impact is limited. The attacker cannot read the response body from the internal request, cannot control request headers or method, and the feature must be explicitly enabled via an experimental flag that is off by default. Deployments that restrict allowedClientIdPatterns to specific trusted domains are not affected. Patched in @backstage/plugin-auth-backend version 0.27.1.
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Show details on NVD website

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CVE-2026-32235 (GCVE-0-2026-32235)

Vulnerability from cvelistv5 – Published: 2026-03-12 18:35 – Updated: 2026-03-12 20:46
VLAI
Title
@backstage/plugin-auth-backend: OAuth redirect URI allowlist bypass
Summary
Backstage is an open framework for building developer portals. Prior to 0.27.1, the experimental OIDC provider in @backstage/plugin-auth-backend is vulnerable to a redirect URI allowlist bypass. Instances that have enabled experimental Dynamic Client Registration or Client ID Metadata Documents and configured allowedRedirectUriPatterns are affected. A specially crafted redirect URI can pass the allowlist validation while resolving to an attacker-controlled host. If a victim approves the resulting OAuth consent request, their authorization code is sent to the attacker, who can exchange it for a valid access token. This requires victim interaction and that one of the experimental features is explicitly enabled, which is not the default. This vulnerability is fixed in 0.27.1.
CWE
  • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
Impacted products
Show details on NVD website

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CVE-2026-25152 (GCVE-0-2026-25152)

Vulnerability from cvelistv5 – Published: 2026-01-30 21:51 – Updated: 2026-02-02 16:29
VLAI
Title
@backstage/plugin-techdocs-node vulnerable to possible Path Traversal in TechDocs Local Generator
Summary
Backstage is an open framework for building developer portals, and @backstage/plugin-techdocs-node provides common node.js functionalities for TechDocs. In versions of @backstage/plugin-techdocs-node prior to 1.13.11 and 1.14.1, a path traversal vulnerability in the TechDocs local generator allows attackers to read arbitrary files from the host filesystem when Backstage is configured with `techdocs.generator.runIn: local`. When processing documentation from untrusted sources, symlinks within the docs directory are followed by MkDocs during the build process. File contents are embedded into generated HTML and exposed to users who can view the documentation. This vulnerability is fixed in` @backstage/plugin-techdocs-node` versions 1.13.11 and 1.14.1. Some workarounds are available. Switch to `runIn: docker` in `app-config.yaml` and/or restrict write access to TechDocs source repositories to trusted users only.
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
Vendor Product Version
backstage backstage Affected: < 1.13.11
Affected: = 1.14.0
Create a notification for this product.
Show details on NVD website

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CVE-2026-25153 (GCVE-0-2026-25153)

Vulnerability from cvelistv5 – Published: 2026-01-30 21:31 – Updated: 2026-02-02 16:29
VLAI
Title
@backstage/plugin-techdocs-node vulnerable to arbitrary code execution via MkDocs hooks
Summary
Backstage is an open framework for building developer portals, and @backstage/plugin-techdocs-node provides common node.js functionalities for TechDocs. In versions of @backstage/plugin-techdocs-node prior to 1.13.11 and 1.14.1, when TechDocs is configured with `runIn: local`, a malicious actor who can submit or modify a repository's `mkdocs.yml` file can execute arbitrary Python code on the TechDocs build server via MkDocs hooks configuration. @backstage/plugin-techdocs-node versions 1.13.11 and 1.14.1 contain a fix. The fix introduces an allowlist of supported MkDocs configuration keys. Unsupported configuration keys (including `hooks`) are now removed from `mkdocs.yml` before running the generator, with a warning logged to indicate which keys were removed. Users of `@techdocs/cli` should also upgrade to the latest version, which includes the fixed `@backstage/plugin-techdocs-node` dependency. Some workarounds are available. Configure TechDocs with `runIn: docker` instead of `runIn: local` to provide container isolation, though it does not fully mitigate the risk. Limit who can modify `mkdocs.yml` files in repositories that TechDocs processes; only allow trusted contributors. Implement PR review requirements for changes to `mkdocs.yml` files to detect malicious `hooks` configurations before they are merged. Use MkDocs < 1.4.0 (e.g., 1.3.1) which does not support hooks. Note: This may limit access to newer MkDocs features. Building documentation in CI/CD pipelines using `@techdocs/cli` does not mitigate this vulnerability, as the CLI uses the same vulnerable `@backstage/plugin-techdocs-node` package.
CWE
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
Impacted products
Vendor Product Version
backstage backstage Affected: < 1.13.11
Affected: = 1.14.0
Create a notification for this product.
Show details on NVD website

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CVE-2024-45815 (GCVE-0-2024-45815)

Vulnerability from cvelistv5 – Published: 2024-09-17 20:14 – Updated: 2024-09-18 14:49
VLAI
Title
Prototype pollution in @backstage/plugin-catalog-backend
Summary
Backstage is an open framework for building developer portals. A malicious actor with authenticated access to a Backstage instance with the catalog backend plugin installed is able to interrupt the service using a specially crafted query to the catalog API. This has been fixed in the `1.26.0` release of the `@backstage/plugin-catalog-backend`. All users are advised to upgrade. There are no known workarounds for this vulnerability.
CWE
  • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
Impacted products
Vendor Product Version
backstage backstage Affected: < 1.26.0
Create a notification for this product.
Show details on NVD website

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CVE-2024-45816 (GCVE-0-2024-45816)

Vulnerability from cvelistv5 – Published: 2024-09-17 20:13 – Updated: 2024-09-18 14:50
VLAI
Title
Storage bucket Directory Traversal in @backstage/plugin-techdocs-backend
Summary
Backstage is an open framework for building developer portals. When using the AWS S3 or GCS storage provider for TechDocs it is possible to access content in the entire storage bucket. This can leak contents of the bucket that are not intended to be accessible, as well as bypass permission checks in Backstage. This has been fixed in the 1.10.13 release of the `@backstage/plugin-techdocs-backend` package. All users are advised to upgrade. There are no known workarounds for this vulnerability.
CWE
  • CWE-23 - Relative Path Traversal
Assigner
References
Impacted products
Vendor Product Version
backstage backstage Affected: < 1.10.13
Create a notification for this product.
Show details on NVD website

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CVE-2024-46976 (GCVE-0-2024-46976)

Vulnerability from cvelistv5 – Published: 2024-09-17 20:12 – Updated: 2024-09-18 13:47
VLAI
Title
Circumvention of cross site scripting Protection in @backstage/plugin-techdocs-backend
Summary
Backstage is an open framework for building developer portals. An attacker with control of the contents of the TechDocs storage buckets is able to inject executable scripts in the TechDocs content that will be executed in the victim's browser when browsing documentation or navigating to an attacker provided link. This has been fixed in the 1.10.13 release of the `@backstage/plugin-techdocs-backend` package. users are advised to upgrade. There are no known workarounds for this vulnerability.
CWE
  • CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
Vendor Product Version
backstage backstage Affected: < 1.10.13
Create a notification for this product.
Show details on NVD website

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CVE-2023-6944 (GCVE-0-2023-6944)

Vulnerability from cvelistv5 – Published: 2024-01-04 10:02 – Updated: 2025-11-20 18:07
VLAI
Title
Rhdh: catalog-import function leaks credentials to frontend
Summary
A flaw was found in the Red Hat Developer Hub (RHDH). The catalog-import function leaks GitLab access tokens on the frontend when the base64 encoded GitLab token includes a newline at the end of the string. The sanitized error can display on the frontend, including the raw access token. Upon gaining access to this token and depending on permissions, an attacker could push malicious code to repositories, delete resources in Git, revoke or generate new keys, and sign code illegitimately.
CWE
  • CWE-209 - Generation of Error Message Containing Sensitive Information
Assigner
References
URL Tags
https://access.redhat.com/errata/RHBA-2024:5869 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2023-6944 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2255204 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat RHDH-1.1-RHEL-9 Unaffected: 1.1-107.1724038966 , < * (rpm)
    cpe:/a:redhat:rhdh:1.1::el9
Create a notification for this product.
Date Public
2023-12-19 00:00
Credits
Red Hat would like to thank Josephine Pfeiffer for reporting this issue.
Show details on NVD website

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CVE-2023-35926 (GCVE-0-2023-35926)

Vulnerability from cvelistv5 – Published: 2023-06-22 13:29 – Updated: 2024-12-05 17:48
VLAI
Title
Insecure sandbox in Backstage Scaffolder plugin
Summary
Backstage is an open platform for building developer portals. The Backstage scaffolder-backend plugin uses a templating library that requires sandbox, as it by design allows for code injection. The library used for this sandbox so far has been `vm2`, but in light of several past vulnerabilities and existing vulnerabilities that may not have a fix, the plugin has switched to using a different sandbox library. A malicious actor with write access to a registered scaffolder template could manipulate the template in a way that allows for remote code execution on the scaffolder-backend instance. This was only exploitable in the template YAML definition itself and not by user input data. This is vulnerability is fixed in version 1.15.0 of `@backstage/plugin-scaffolder-backend`.
CWE
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
Impacted products
Vendor Product Version
backstage backstage Affected: < 1.15.0
Create a notification for this product.
Show details on NVD website

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CVE-2021-43783 (GCVE-0-2021-43783)

Vulnerability from cvelistv5 – Published: 2021-11-29 19:20 – Updated: 2024-08-04 04:03
VLAI
Title
Path Traversal in @backstage/plugin-scaffolder-backend
Summary
@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. In affected versions a malicious actor with write access to a registered scaffolder template is able to manipulate the template in a way that writes files to arbitrary paths on the scaffolder-backend host instance. This vulnerability can in some situation also be exploited through user input when executing a template, meaning you do not need write access to the templates. This method will not allow the attacker to control the contents of the injected file however, unless the template is also crafted in a specific way that gives control of the file contents. This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates.
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
Vendor Product Version
backstage backstage Affected: < 0.15.14
Create a notification for this product.
Show details on NVD website

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FKIE_CVE-2026-25152

Vulnerability from fkie_nvd - Published: 2026-01-30 22:15 - Updated: 2026-02-19 15:37
Summary
Backstage is an open framework for building developer portals, and @backstage/plugin-techdocs-node provides common node.js functionalities for TechDocs. In versions of @backstage/plugin-techdocs-node prior to 1.13.11 and 1.14.1, a path traversal vulnerability in the TechDocs local generator allows attackers to read arbitrary files from the host filesystem when Backstage is configured with `techdocs.generator.runIn: local`. When processing documentation from untrusted sources, symlinks within the docs directory are followed by MkDocs during the build process. File contents are embedded into generated HTML and exposed to users who can view the documentation. This vulnerability is fixed in` @backstage/plugin-techdocs-node` versions 1.13.11 and 1.14.1. Some workarounds are available. Switch to `runIn: docker` in `app-config.yaml` and/or restrict write access to TechDocs source repositories to trusted users only.
Impacted products
Vendor Product Version
linuxfoundation backstage *
linuxfoundation backstage *

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FKIE_CVE-2026-25153

Vulnerability from fkie_nvd - Published: 2026-01-30 22:15 - Updated: 2026-02-19 15:26
Summary
Backstage is an open framework for building developer portals, and @backstage/plugin-techdocs-node provides common node.js functionalities for TechDocs. In versions of @backstage/plugin-techdocs-node prior to 1.13.11 and 1.14.1, when TechDocs is configured with `runIn: local`, a malicious actor who can submit or modify a repository's `mkdocs.yml` file can execute arbitrary Python code on the TechDocs build server via MkDocs hooks configuration. @backstage/plugin-techdocs-node versions 1.13.11 and 1.14.1 contain a fix. The fix introduces an allowlist of supported MkDocs configuration keys. Unsupported configuration keys (including `hooks`) are now removed from `mkdocs.yml` before running the generator, with a warning logged to indicate which keys were removed. Users of `@techdocs/cli` should also upgrade to the latest version, which includes the fixed `@backstage/plugin-techdocs-node` dependency. Some workarounds are available. Configure TechDocs with `runIn: docker` instead of `runIn: local` to provide container isolation, though it does not fully mitigate the risk. Limit who can modify `mkdocs.yml` files in repositories that TechDocs processes; only allow trusted contributors. Implement PR review requirements for changes to `mkdocs.yml` files to detect malicious `hooks` configurations before they are merged. Use MkDocs < 1.4.0 (e.g., 1.3.1) which does not support hooks. Note: This may limit access to newer MkDocs features. Building documentation in CI/CD pipelines using `@techdocs/cli` does not mitigate this vulnerability, as the CLI uses the same vulnerable `@backstage/plugin-techdocs-node` package.
Impacted products
Vendor Product Version
linuxfoundation backstage *
linuxfoundation backstage *

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}

FKIE_CVE-2024-46976

Vulnerability from fkie_nvd - Published: 2024-09-17 21:15 - Updated: 2025-01-03 14:52
Summary
Backstage is an open framework for building developer portals. An attacker with control of the contents of the TechDocs storage buckets is able to inject executable scripts in the TechDocs content that will be executed in the victim's browser when browsing documentation or navigating to an attacker provided link. This has been fixed in the 1.10.13 release of the `@backstage/plugin-techdocs-backend` package. users are advised to upgrade. There are no known workarounds for this vulnerability.
Impacted products
Vendor Product Version
linuxfoundation backstage *

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FKIE_CVE-2024-45815

Vulnerability from fkie_nvd - Published: 2024-09-17 21:15 - Updated: 2025-01-03 14:53
Summary
Backstage is an open framework for building developer portals. A malicious actor with authenticated access to a Backstage instance with the catalog backend plugin installed is able to interrupt the service using a specially crafted query to the catalog API. This has been fixed in the `1.26.0` release of the `@backstage/plugin-catalog-backend`. All users are advised to upgrade. There are no known workarounds for this vulnerability.
Impacted products
Vendor Product Version
linuxfoundation backstage *

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FKIE_CVE-2024-45816

Vulnerability from fkie_nvd - Published: 2024-09-17 21:15 - Updated: 2025-01-03 14:52
Summary
Backstage is an open framework for building developer portals. When using the AWS S3 or GCS storage provider for TechDocs it is possible to access content in the entire storage bucket. This can leak contents of the bucket that are not intended to be accessible, as well as bypass permission checks in Backstage. This has been fixed in the 1.10.13 release of the `@backstage/plugin-techdocs-backend` package. All users are advised to upgrade. There are no known workarounds for this vulnerability.
Impacted products
Vendor Product Version
linuxfoundation backstage *

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FKIE_CVE-2023-6944

Vulnerability from fkie_nvd - Published: 2024-01-04 10:15 - Updated: 2025-09-05 12:15
Summary
A flaw was found in the Red Hat Developer Hub (RHDH). The catalog-import function leaks GitLab access tokens on the frontend when the base64 encoded GitLab token includes a newline at the end of the string. The sanitized error can display on the frontend, including the raw access token. Upon gaining access to this token and depending on permissions, an attacker could push malicious code to repositories, delete resources in Git, revoke or generate new keys, and sign code illegitimately.
Impacted products

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FKIE_CVE-2023-35926

Vulnerability from fkie_nvd - Published: 2023-06-22 14:15 - Updated: 2024-11-21 08:08
Summary
Backstage is an open platform for building developer portals. The Backstage scaffolder-backend plugin uses a templating library that requires sandbox, as it by design allows for code injection. The library used for this sandbox so far has been `vm2`, but in light of several past vulnerabilities and existing vulnerabilities that may not have a fix, the plugin has switched to using a different sandbox library. A malicious actor with write access to a registered scaffolder template could manipulate the template in a way that allows for remote code execution on the scaffolder-backend instance. This was only exploitable in the template YAML definition itself and not by user input data. This is vulnerability is fixed in version 1.15.0 of `@backstage/plugin-scaffolder-backend`.
Impacted products
Vendor Product Version
linuxfoundation backstage *

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      "url": "https://github.com/backstage/backstage/commit/fb7375507d56faedcb7bb3665480070593c8949a"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/backstage/backstage/releases/tag/v1.15.0"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/backstage/backstage/security/advisories/GHSA-wg6p-jmpc-xjmr"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

FKIE_CVE-2021-43783

Vulnerability from fkie_nvd - Published: 2021-11-29 20:15 - Updated: 2025-01-03 14:52
Summary
@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. In affected versions a malicious actor with write access to a registered scaffolder template is able to manipulate the template in a way that writes files to arbitrary paths on the scaffolder-backend host instance. This vulnerability can in some situation also be exploited through user input when executing a template, meaning you do not need write access to the templates. This method will not allow the attacker to control the contents of the injected file however, unless the template is also crafted in a specific way that gives control of the file contents. This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates.
Impacted products
Vendor Product Version
linuxfoundation backstage *

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3983C003-B182-4718-9390-D862FBF9687A",
              "versionEndExcluding": "0.15.14",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. In affected versions a malicious actor with write access to a registered scaffolder template is able to manipulate the template in a way that writes files to arbitrary paths on the scaffolder-backend host instance. This vulnerability can in some situation also be exploited through user input when executing a template, meaning you do not need write access to the templates. This method will not allow the attacker to control the contents of the injected file however, unless the template is also crafted in a specific way that gives control of the file contents. This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates."
    },
    {
      "lang": "es",
      "value": "backstage/plugin-scaffolder-backend es el backend para las plantillas de software Backstage por defecto. En las versiones afectadas, un actor malicioso con acceso de escritura a una plantilla de scaffolder registrada es capaz de manipular la plantilla de manera que escriba archivos en rutas arbitrarias en la instancia del host de scaffolder-backend. Esta vulnerabilidad tambi\u00e9n puede ser explotada en alguna situaci\u00f3n mediante la entrada del usuario cuando se ejecuta una plantilla, lo que significa que no se necesita acceso de escritura a las plantillas. Sin embargo, este m\u00e9todo no permitir\u00e1 al atacante controlar el contenido del archivo inyectado, a menos que la plantilla tambi\u00e9n est\u00e9 dise\u00f1ada de una forma espec\u00edfica que permita controlar el contenido del archivo. Esta vulnerabilidad ha sido corregida en la versi\u00f3n \"0.15.14\" del \"@backstage/plugin-scaffolder-backend\". Este ataque es mitigado restringiendo el acceso y requiriendo revisiones cuando son registradas o modifican las plantillas de scaffolder"
    }
  ],
  "id": "CVE-2021-43783",
  "lastModified": "2025-01-03T14:52:50.143",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.5,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.0,
        "impactScore": 4.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 8.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 4.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 8.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 4.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-11-29T20:15:08.077",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}