Vulnerability-Lookup

RHSA-2026:50953

Vulnerability from csaf_redhat - Published: 2026-08-06 01:04 - Updated: 2026-09-11 13:55

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Important

Notes

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

Details: This update includes the following RPMs: trivy: * trivy-0.73.0-0.1.hum1 (aarch64, x86_64) * trivy-0.73.0-0.1.hum1.src (src)

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-2026-71556

A flaw was found in go-git, an extensible Git implementation library. Worktree operations, such as checkout, status, and add, resolve symbolic links within the working tree without proper boundary confinement. This allows a remote attacker to craft a malicious repository containing a symlink, which, when cloned and its worktree operations are used, can lead to reading from or writing to arbitrary files outside the intended working directory. This could result in information disclosure or arbitrary file modification.

7.1 (High)


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

CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Affected products

Fixed 3 products

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

Threats

Impact Important

CVE-2026-75593

A flaw was found in BuildKit, a toolkit for converting source code to build artifacts. A malicious client with valid permissions to access the BuildKit control API can craft a special upload request. This request allows files to escape from the BuildKit-controlled state directory, potentially leading to unauthorized modification or deletion of files on the system.

6.5 (Medium)


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

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

Affected products

Fixed 3 products

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

Threats

Impact Moderate

References

21 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:50953	self
https://images.redhat.com/	external
https://access.redhat.com/security/cve/CVE-2026-75593	external
https://access.redhat.com/security/updates/classi…	external
https://access.redhat.com/security/cve/CVE-2026-71556	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-71556	self
https://bugzilla.redhat.com/show_bug.cgi?id=2512562	external
https://www.cve.org/CVERecord?id=CVE-2026-71556	external
https://nvd.nist.gov/vuln/detail/CVE-2026-71556	external
https://github.com/go-git/go-git/commit/008a78f2d…	external
https://github.com/go-git/go-git/commit/661d1c7f1…	external
https://github.com/go-git/go-git/releases/tag/v5.19.2	external
https://github.com/go-git/go-git/releases/tag/v6.…	external
https://github.com/go-git/go-git/security/advisor…	external
https://access.redhat.com/security/cve/CVE-2026-75593	self
https://bugzilla.redhat.com/show_bug.cgi?id=2519913	external
https://www.cve.org/CVERecord?id=CVE-2026-75593	external
https://nvd.nist.gov/vuln/detail/CVE-2026-75593	external
https://github.com/moby/buildkit/releases/tag/v0.31.2	external
https://github.com/moby/buildkit/security/advisor…	external

JSON

To clipboard

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          "title": "Vulnerability description"
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          "text": "go-git is a pure-Go implementation of Git. During worktree operations (checkout, status, add), go-git resolves symbolic links without confining resolution to the worktree boundary, so a maliciously crafted repository containing a symlink can cause a consuming application to read from or write to files outside the intended working directory when that repository is cloned and its worktree operations are used. Exploitation requires the application to clone an attacker-controlled repository and then perform worktree operations against it; applications that only process trusted repositories are not exposed. Red Hat rates the impact of this flaw as Important.",
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            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
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            "version": "3.1"
          },
          "products": [
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            "Red Hat Hardened Images:trivy-main@src",
            "Red Hat Hardened Images:trivy-main@x86_64"
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        }
      ],
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          "details": "Important"
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      "title": "github.com/go-git/go-git/v5: go-git: Arbitrary file read/write via symbolic link resolution"
    },
    {
      "cve": "CVE-2026-75593",
      "cwe": {
        "id": "CWE-22",
        "name": "Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)"
      },
      "discovery_date": "2026-08-19T20:21:08.000514+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2519913"
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          "title": "Vulnerability description"
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          "text": "github.com/moby/buildkit: BuildKit: File escape vulnerability allows unauthorized file modification",
          "title": "Vulnerability summary"
        },
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          "category": "other",
          "text": "A flaw in BuildKit allows a client with valid permissions to the BuildKit control API to perform unauthorized file modifications outside the intended build state directory. This issue is limited to authenticated clients, reducing the overall attack surface.",
          "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.",
          "title": "CVSS score applicability"
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      ],
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75593"
        },
        {
          "category": "external",
          "summary": "https://github.com/moby/buildkit/releases/tag/v0.31.2",
          "url": "https://github.com/moby/buildkit/releases/tag/v0.31.2"
        },
        {
          "category": "external",
          "summary": "https://github.com/moby/buildkit/security/advisories/GHSA-g2h8-426c-7976",
          "url": "https://github.com/moby/buildkit/security/advisories/GHSA-g2h8-426c-7976"
        }
      ],
      "release_date": "2026-08-19T20:06:54.924000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-06T01:04:57+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:trivy-main@aarch64",
            "Red Hat Hardened Images:trivy-main@src",
            "Red Hat Hardened Images:trivy-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:50953"
        },
        {
          "category": "workaround",
          "details": "Restrict access to the BuildKit control API to only trusted users and services. Implement robust authentication and authorization policies for all clients interacting with the BuildKit daemon to prevent unauthorized access and potential file system escapes.",
          "product_ids": [
            "Red Hat Hardened Images:trivy-main@aarch64",
            "Red Hat Hardened Images:trivy-main@src",
            "Red Hat Hardened Images:trivy-main@x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:trivy-main@aarch64",
            "Red Hat Hardened Images:trivy-main@src",
            "Red Hat Hardened Images:trivy-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "github.com/moby/buildkit: BuildKit: File escape vulnerability allows unauthorized file modification"
    }
  ]
}

CVE-2026-71556 (GCVE-0-2026-71556)

Vulnerability from cvelistv5 – Published: 2026-08-07 16:37 – Updated: 2026-08-07 16:58

Title

go-git: Worktree operations may follow symlinks

Summary

go-git is an extensible git implementation library written in pure Go. Prior to 5.19.2 and 6.0.0-alpha.5, worktree operations (including checkout, status, and add) resolve symbolic links inside the working tree without confining resolution to the worktree boundary, so a maliciously crafted repository containing a symlink can cause go-git to read from or write to files outside the intended working directory when the repository is cloned and its worktree operations are used. Versions 5.19.2 and 6.0.0-alpha.5.

Severity

7.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-07 16:58 UTC

CWE

CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Assigner

GitHub_M mitre root

References

5 references

URL	Tags
https://github.com/go-git/go-git/security/advisor…	x_refsource_CONFIRM
https://github.com/go-git/go-git/commit/008a78f2d…	x_refsource_MISC
https://github.com/go-git/go-git/commit/661d1c7f1…	x_refsource_MISC
https://github.com/go-git/go-git/releases/tag/v5.19.2	x_refsource_MISC
https://github.com/go-git/go-git/releases/tag/v6.…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
go-git	go-git	Affected: < 5.19.2 Affected: >= 6.0.0-alpha.1, < 6.0.0-alpha.5

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-71556",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-07T16:58:08.599214Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-07T16:58:19.113Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "go-git",
          "vendor": "go-git",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.19.2"
            },
            {
              "status": "affected",
              "version": "\u003e= 6.0.0-alpha.1, \u003c 6.0.0-alpha.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "go-git is an extensible git implementation library written in pure Go. Prior to 5.19.2 and 6.0.0-alpha.5, worktree operations (including checkout, status, and add) resolve symbolic links inside the working tree without confining resolution to the worktree boundary, so a maliciously crafted repository containing a symlink can cause go-git to read from or write to files outside the intended working directory when the repository is cloned and its worktree operations are used. Versions 5.19.2 and 6.0.0-alpha.5."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-59",
              "description": "CWE-59: Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-07T16:37:40.058Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/go-git/go-git/security/advisories/GHSA-hc8v-wwc9-vgxm",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/go-git/go-git/security/advisories/GHSA-hc8v-wwc9-vgxm"
        },
        {
          "name": "https://github.com/go-git/go-git/commit/008a78f2dd86f52544ddff8b8e8ddeecdf3f7aab",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/go-git/go-git/commit/008a78f2dd86f52544ddff8b8e8ddeecdf3f7aab"
        },
        {
          "name": "https://github.com/go-git/go-git/commit/661d1c7f101d34e002a3cfcf8dbea5b7421d07ac",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/go-git/go-git/commit/661d1c7f101d34e002a3cfcf8dbea5b7421d07ac"
        },
        {
          "name": "https://github.com/go-git/go-git/releases/tag/v5.19.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/go-git/go-git/releases/tag/v5.19.2"
        },
        {
          "name": "https://github.com/go-git/go-git/releases/tag/v6.0.0-alpha.5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/go-git/go-git/releases/tag/v6.0.0-alpha.5"
        }
      ],
      "source": {
        "advisory": "GHSA-hc8v-wwc9-vgxm",
        "discovery": "UNKNOWN"
      },
      "title": "go-git: Worktree operations may follow symlinks"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-71556",
    "datePublished": "2026-08-07T16:37:40.058Z",
    "dateReserved": "2026-08-06T21:24:15.376Z",
    "dateUpdated": "2026-08-07T16:58:19.113Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-75593 (GCVE-0-2026-75593)

Vulnerability from cvelistv5 – Published: 2026-08-19 20:06 – Updated: 2026-08-25 14:02

Title

BuildKit: Malicious client can bypass destination directory validation on local sources upload

Summary

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to 0.31.2, a custom client can produce such an upload request to the BuildKit daemon that files can escape from the BuildKit-controlled state directory. The client needs to have valid permissions to access BuildKit control API to issue builds, eg., bypass authentication, etc. This issue is fixed in version 0.31.2.

Severity

7.2 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-25 14:02 UTC

CWE

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

Assigner

GitHub_M mitre root

References

2 references

URL	Tags
https://github.com/moby/buildkit/security/advisor…	x_refsource_CONFIRM
https://github.com/moby/buildkit/releases/tag/v0.31.2	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
moby	buildkit	Affected: < 0.31.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-75593",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-25T14:02:16.589697Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-25T14:02:29.264Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "buildkit",
          "vendor": "moby",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.31.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. Prior to 0.31.2, a custom client can produce such an upload request to the BuildKit daemon that files can escape from the BuildKit-controlled state directory. The client needs to have valid permissions to access BuildKit control API to issue builds, eg., bypass authentication, etc. This issue is fixed in version 0.31.2."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T20:06:54.924Z",
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      },
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        {
          "name": "https://github.com/moby/buildkit/security/advisories/GHSA-g2h8-426c-7976",
          "tags": [
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          ],
          "url": "https://github.com/moby/buildkit/security/advisories/GHSA-g2h8-426c-7976"
        },
        {
          "name": "https://github.com/moby/buildkit/releases/tag/v0.31.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/moby/buildkit/releases/tag/v0.31.2"
        }
      ],
      "source": {
        "advisory": "GHSA-g2h8-426c-7976",
        "discovery": "UNKNOWN"
      },
      "title": "BuildKit: Malicious client can bypass destination directory validation on local sources upload"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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    "dateReserved": "2026-08-17T23:49:03.449Z",
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    "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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

RHSA-2026:50953

CVE-2026-71556 (GCVE-0-2026-71556)

CVE-2026-75593 (GCVE-0-2026-75593)

Tags

Sightings

Nomenclature