Vulnerability-Lookup

RHSA-2026:42923

Vulnerability from csaf_redhat - Published: 2026-07-21 16:36 - Updated: 2026-07-26 16:07

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Severity

Moderate

Notes

Topic: An update for Red Hat Hardened Images RPMs is now available.

Details: This update includes the following RPMs: rust: * cargo-1.97.1-1.1.hum1 (aarch64, x86_64) * clippy-1.97.1-1.1.hum1 (aarch64, x86_64) * rust-1.97.1-1.1.hum1 (aarch64, x86_64) * rust-analyzer-1.97.1-1.1.hum1 (aarch64, x86_64) * rust-debugger-common-1.97.1-1.1.hum1 (noarch) * rust-doc-1.97.1-1.1.hum1 (aarch64, x86_64) * rust-gdb-1.97.1-1.1.hum1 (noarch) * rust-lldb-1.97.1-1.1.hum1 (noarch) * rust-src-1.97.1-1.1.hum1 (noarch) * rust-std-static-1.97.1-1.1.hum1 (aarch64, x86_64) * rust-std-static-aarch64-unknown-none-softfloat-1.97.1-1.1.hum1 (noarch) * rust-std-static-aarch64-unknown-uefi-1.97.1-1.1.hum1 (noarch) * rust-std-static-i686-pc-windows-gnu-1.97.1-1.1.hum1 (noarch) * rust-std-static-wasm32-unknown-unknown-1.97.1-1.1.hum1 (noarch) * rust-std-static-wasm32-wasip1-1.97.1-1.1.hum1 (noarch) * rust-std-static-x86_64-pc-windows-gnu-1.97.1-1.1.hum1 (noarch) * rust-std-static-x86_64-unknown-none-1.97.1-1.1.hum1 (noarch) * rust-std-static-x86_64-unknown-uefi-1.97.1-1.1.hum1 (noarch) * rustfmt-1.97.1-1.1.hum1 (aarch64, x86_64) * rust-1.97.1-1.1.hum1.src (src) Security Fix(es): rust: * CVE-2026-50185

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-5223

A flaw was found in Cargo. When processing crate tarballs from third-party registries, Cargo mishandled symbolic links (symlinks) embedded within these archives. This vulnerability enables a malicious crate to overwrite the source code of another crate originating from the same registry. Such an action could lead to unauthorized modification of software components, potentially introducing security risks or operational disruptions.

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected products

Fixed 4 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:rust-main@aarch64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:rust-main@noarch	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:rust-main@src	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:rust-main@x86_64	—	Vendor Fix fix Workaround

Threats

Impact Moderate

References

13 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:42923	self
https://access.redhat.com/security/cve/CVE-2026-50185	external
https://access.redhat.com/security/updates/classi…	external
https://images.redhat.com/	external
https://access.redhat.com/security/cve/CVE-2026-5223	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-5223	self
https://bugzilla.redhat.com/show_bug.cgi?id=2481158	external
https://www.cve.org/CVERecord?id=CVE-2026-5223	external
https://nvd.nist.gov/vuln/detail/CVE-2026-5223	external
https://blog.rust-lang.org/2026/05/25/cve-2026-5223/	external
https://github.com/rust-lang/cargo/pull/17031	external
https://groups.google.com/g/rustlang-security-ann…	external

JSON

To clipboard

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      "cve": "CVE-2026-5223",
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        "id": "CWE-22",
        "name": "Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)"
      },
      "discovery_date": "2026-05-25T10:00:51.617723+00:00",
      "ids": [
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          "text": "2481158"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Cargo. When processing crate tarballs from third-party registries, Cargo mishandled symbolic links (symlinks) embedded within these archives. This vulnerability enables a malicious crate to overwrite the source code of another crate originating from the same registry. Such an action could lead to unauthorized modification of software components, potentially introducing security risks or operational disruptions.",
          "title": "Vulnerability description"
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        {
          "category": "summary",
          "text": "cargo: Cargo: Source code overwrite due to symlink mishandling in third-party registries",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This Moderate vulnerability in Cargo arises from improper handling of symlinks within crate tarballs downloaded from third-party registries. An attacker could exploit this by publishing a malicious crate containing symlinks, leading to the overwrite of source code from other crates in the same registry. Red Hat customers using `crates.io` are not affected, as `crates.io` prohibits symlinks in uploaded crates.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2481158"
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          "url": "https://www.cve.org/CVERecord?id=CVE-2026-5223"
        },
        {
          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5223"
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        {
          "category": "external",
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          "summary": "https://groups.google.com/g/rustlang-security-announcements/c/IB74S7Yksg8",
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        }
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      "release_date": "2026-05-25T08:57:08.488000+00:00",
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          "date": "2026-07-21T16:36:38+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:rust-main@aarch64",
            "Red Hat Hardened Images:rust-main@noarch",
            "Red Hat Hardened Images:rust-main@src",
            "Red Hat Hardened Images:rust-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:42923"
        },
        {
          "category": "workaround",
          "details": "To mitigate this issue, avoid using untrusted third-party Cargo registries. If third-party registries are necessary, ensure they enforce strict policies against symlinks in crate tarballs and verify the integrity of downloaded crates. No direct configuration or operational workaround is available within Cargo itself to prevent this specific symlink mishandling when using vulnerable third-party registries.",
          "product_ids": [
            "Red Hat Hardened Images:rust-main@aarch64",
            "Red Hat Hardened Images:rust-main@noarch",
            "Red Hat Hardened Images:rust-main@src",
            "Red Hat Hardened Images:rust-main@x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:rust-main@aarch64",
            "Red Hat Hardened Images:rust-main@noarch",
            "Red Hat Hardened Images:rust-main@src",
            "Red Hat Hardened Images:rust-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "cargo: Cargo: Source code overwrite due to symlink mishandling in third-party registries"
    }
  ]
}

CVE-2026-5223 (GCVE-0-2026-5223)

Vulnerability from cvelistv5 – Published: 2026-05-25 08:57 – Updated: 2026-05-27 18:35

Title

Crates in third party registries can override the cached source of other crates

Summary

Cargo incorrectly handled symlinks inside of crate tarballs downloaded from third-party registries, allowing a malicious crate to override the source code of another crate from the same registry. The severity of the vulnerability is **medium** for users of third-party registries. Users of crates.io are **not affected**, as crates.io forbids uploading crates containing any symlink.

Severity

6.5 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-61 - UNIX symbolic link (symlink) following

Assigner

rust

References

3 references

URL	Tags
https://groups.google.com/g/rustlang-security-ann…	vendor-advisorymailing-list
https://blog.rust-lang.org/2026/05/25/cve-2026-5223/	vendor-advisory
https://github.com/rust-lang/cargo/pull/17031	patch

Impacted products

1 product

Vendor	Product	Version
Rust Project	Cargo	Affected: 1.0.0 , < 1.96.0 (semver)

Show details on NVD website

JSON

To clipboard

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            "attackVector": "NETWORK",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "LOW",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-61",
              "description": "CWE-61 UNIX symbolic link (symlink) following",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-25T08:57:08.488Z",
        "orgId": "986d4109-89ea-491f-99fd-a8e4803919bd",
        "shortName": "rust"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory",
            "mailing-list"
          ],
          "url": "https://groups.google.com/g/rustlang-security-announcements/c/IB74S7Yksg8"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://blog.rust-lang.org/2026/05/25/cve-2026-5223/"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/rust-lang/cargo/pull/17031"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Rust 1.96.0, to be released on May 28th, 2026, will update Cargo to \nreject extracting *any* symlink within crate tarballs, regardless of \nwhether they come from crates.io (which already forbids them) or \nthird-party registries. Note that Cargo never added symlinks when \nrunning `cargo package` or `cargo publish`, so the impact of this should be\n minimal."
            }
          ],
          "value": "Rust 1.96.0, to be released on May 28th, 2026, will update Cargo to \nreject extracting *any* symlink within crate tarballs, regardless of \nwhether they come from crates.io (which already forbids them) or \nthird-party registries. Note that Cargo never added symlinks when \nrunning `cargo package` or `cargo publish`, so the impact of this should be\n minimal."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Crates in third party registries can override the cached source of other crates",
      "workarounds": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Users who are not able to upgrade to the most recent Rust version are recommended to audit the contents of their registry for the presence of any symlink, and to configure their registry to reject symlink (if such option is available).\u003cbr\u003e"
            }
          ],
          "value": "Users who are not able to upgrade to the most recent Rust version are recommended to audit the contents of their registry for the presence of any symlink, and to configure their registry to reject symlink (if such option is available)."
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 1.0.2"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "986d4109-89ea-491f-99fd-a8e4803919bd",
    "assignerShortName": "rust",
    "cveId": "CVE-2026-5223",
    "datePublished": "2026-05-25T08:57:08.488Z",
    "dateReserved": "2026-03-31T12:07:41.420Z",
    "dateUpdated": "2026-05-27T18:35:35.093Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

RHSA-2026:42923

CVE-2026-5223 (GCVE-0-2026-5223)

Tags

Sightings

Nomenclature