Vulnerability-Lookup

RHSA-2026:73262

Vulnerability from csaf_redhat - Published: 2026-09-29 11:52 - Updated: 2026-10-07 10:07

Summary

Red Hat Security Advisory: OpenShift Virtualization v4.21 Images

Severity

Important

Notes

Topic: Red Hat OpenShift Virtualization release v4.21 is now available with updates to packages and images that fix several bugs and add enhancements.

Details: OpenShift Virtualization is Red Hat's virtualization solution designed for Red Hat OpenShift Container Platform. This advisory contains OpenShift Virtualization v4.21 images.

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 Container Native Virtualization 4.21:registry.redhat.io/container-native-virtualization/cnv-must-gather-rhel9@sha256:0a1f4a9cba4f376b1f15ae510033974bd0f43b039940dbd4f4db554633936e14_arm64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Container Native Virtualization 4.21:registry.redhat.io/container-native-virtualization/cnv-must-gather-rhel9@sha256:64ee4e071723ee35b3bbd243551c8a0ced300c1f5d146980d1fd0d5ebf2e8756_amd64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Container Native Virtualization 4.21:registry.redhat.io/container-native-virtualization/cnv-must-gather-rhel9@sha256:9b6b35961e96a862c60f90491b159706140001140284babd00dae000d3e625ab_s390x	—	Vendor Fix fix Workaround

Threats

Impact Important

References

13 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:73262	self
https://access.redhat.com/security/cve/CVE-2026-71556	external
https://access.redhat.com/security/updates/classi…	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

JSON

To clipboard

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          "text": "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.",
          "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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          "Red Hat Container Native Virtualization 4.21:registry.redhat.io/container-native-virtualization/cnv-must-gather-rhel9@sha256:9b6b35961e96a862c60f90491b159706140001140284babd00dae000d3e625ab_s390x"
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          "category": "external",
          "summary": "RHBZ#2512562",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2512562"
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        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-71556",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-71556"
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        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-71556",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71556"
        },
        {
          "category": "external",
          "summary": "https://github.com/go-git/go-git/commit/008a78f2dd86f52544ddff8b8e8ddeecdf3f7aab",
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          "summary": "https://github.com/go-git/go-git/commit/661d1c7f101d34e002a3cfcf8dbea5b7421d07ac",
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      "remediations": [
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          "date": "2026-09-29T11:52:57+00:00",
          "details": "Before applying this update, make sure all previously released errata relevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
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            "Red Hat Container Native Virtualization 4.21:registry.redhat.io/container-native-virtualization/cnv-must-gather-rhel9@sha256:9b6b35961e96a862c60f90491b159706140001140284babd00dae000d3e625ab_s390x"
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            "category": "none"
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          "url": "https://access.redhat.com/errata/RHSA-2026:73262"
        },
        {
          "category": "workaround",
          "details": "To reduce the risk of exploitation, do not clone or run worktree operations (checkout, status, add) on Git repositories originating from untrusted or attacker-controllable sources using an affected version of go-git. The issue is resolved by updating to go-git 5.19.2 or 6.0.0-alpha.5 (or later).",
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      "scores": [
        {
          "cvss_v3": {
            "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"
          },
          "products": [
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            "Red Hat Container Native Virtualization 4.21:registry.redhat.io/container-native-virtualization/cnv-must-gather-rhel9@sha256:64ee4e071723ee35b3bbd243551c8a0ced300c1f5d146980d1fd0d5ebf2e8756_amd64",
            "Red Hat Container Native Virtualization 4.21:registry.redhat.io/container-native-virtualization/cnv-must-gather-rhel9@sha256:9b6b35961e96a862c60f90491b159706140001140284babd00dae000d3e625ab_s390x"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "github.com/go-git/go-git/v5: go-git: Arbitrary file read/write via symbolic link resolution"
    }
  ]
}

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 Scorecard

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

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{
  "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"
}

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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

RHSA-2026:73262

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

Tags

Sightings

Nomenclature

Related by attack behaviour