Vulnerability-Lookup

CVE-2026-20897 (GCVE-0-2026-20897)

Vulnerability from cvelistv5 – Published: 2026-01-22 22:01 – Updated: 2026-07-15 01:20

Title

Gitea Git LFS Lock Deletion Broken Access Control (Cross-Repo IDOR)

Summary

Gitea does not properly validate repository ownership when deleting Git LFS locks. A user with write access to one repository may be able to delete LFS locks belonging to other repositories.

Severity

9.1 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-23 17:56 UTC

CWE

CWE-284 - Improper Access Control
CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

Gitea CNA under the mitre root

CNA scorecard C 61/100 over 165 records in the last 180 days details

References

8 references

URL	Tags
https://github.com/go-gitea/gitea/security/adviso…	vendor-advisory
https://github.com/go-gitea/gitea/pull/36344	patch
https://github.com/go-gitea/gitea/pull/36349	patch
https://github.com/go-gitea/gitea/releases/tag/v1.25.4	release-notes
https://blog.gitea.com/release-of-1.25.4/	release-notes
https://access.redhat.com/security/cve/CVE-2026-20897	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2432204	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex

Impacted products

2 products

Vendor	Product	Version	CPE status
Gitea	Gitea Open Source Git Server	Affected: 0 , ≤ 1.25.3 (semver)	guessed
Red Hat	OpenShift Pipelines	cpe:/a:redhat:openshift_pipelines:1

Credits

spingARbor

Show details on NVD website

JSON

To clipboard

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}

bit-gitea-2026-20897

Vulnerability from bitnami_vulndb

Published

2026-01-30 08:40

Modified

2026-09-08 08:34

Summary

Gitea Git LFS Lock Deletion Broken Access Control (Cross-Repo IDOR)

Details

Gitea does not properly validate repository ownership when deleting Git LFS locks. A user with write access to one repository may be able to delete LFS locks belonging to other repositories.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "gitea",
        "purl": "pkg:bitnami/gitea"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.25.4"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-20897"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:gitea:gitea:*:*:*:*:*:-:*:*"
    ],
    "severity": "Critical"
  },
  "details": "Gitea does not properly validate repository ownership when deleting Git LFS locks. A user with write access to one repository may be able to delete LFS locks belonging to other repositories.",
  "id": "BIT-gitea-2026-20897",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2026-01-30T08:40:45.840Z",
  "references": [
    {
      "type": "ARTICLE",
      "url": "https://blog.gitea.com/release-of-1.25.4/"
    },
    {
      "type": "FIX",
      "url": "https://github.com/go-gitea/gitea/pull/36344"
    },
    {
      "type": "FIX",
      "url": "https://github.com/go-gitea/gitea/pull/36349"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/go-gitea/gitea/releases/tag/v1.25.4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-rrq5-r9h5-pc7c"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20897"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-20897"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2432204"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20897.json"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Gitea Git LFS Lock Deletion Broken Access Control (Cross-Repo IDOR)"
}

FKIE_CVE-2026-20897

Vulnerability from fkie_nvd - Published: 2026-01-22 22:16 - Updated: 2026-07-15 02:18

Severity

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Summary

Gitea does not properly validate repository ownership when deleting Git LFS locks. A user with write access to one repository may be able to delete LFS locks belonging to other repositories.

References

URL	Tags
88ee5874-cf24-4952-aea0-31affedb7ff2	https://blog.gitea.com/release-of-1.25.4/	Release Notes
88ee5874-cf24-4952-aea0-31affedb7ff2	https://github.com/go-gitea/gitea/pull/36344	Issue Tracking, Patch
88ee5874-cf24-4952-aea0-31affedb7ff2	https://github.com/go-gitea/gitea/pull/36349	Issue Tracking, Patch
88ee5874-cf24-4952-aea0-31affedb7ff2	https://github.com/go-gitea/gitea/releases/tag/v1.25.4	Release Notes
88ee5874-cf24-4952-aea0-31affedb7ff2	https://github.com/go-gitea/gitea/security/advisories/GHSA-rrq5-r9h5-pc7c	Broken Link
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/security/cve/CVE-2026-20897
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://bugzilla.redhat.com/show_bug.cgi?id=2432204
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20897.json

Impacted products

	Vendor	Product	Version
	gitea	gitea	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Gitea Open Source Git Server",
          "vendor": "Gitea",
          "versions": [
            {
              "lessThanOrEqual": "1.25.3",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
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      ],
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2"
    },
    {
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          "product": "OpenShift Pipelines",
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        },
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          "cpes": [
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      ],
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  ],
  "configurations": [
    {
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          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:gitea:gitea:*:*:*:*:*:-:*:*",
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              "versionEndExcluding": "1.25.4",
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  "cveTags": [],
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    },
    {
      "lang": "es",
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    }
  ],
  "id": "CVE-2026-20897",
  "lastModified": "2026-07-15T02:18:24.600",
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        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-20897",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-01-23T17:56:55.236953Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-01-22T22:16:18.960",
  "references": [
    {
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
      "tags": [
        "Release Notes"
      ],
      "url": "https://blog.gitea.com/release-of-1.25.4/"
    },
    {
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/go-gitea/gitea/pull/36344"
    },
    {
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/go-gitea/gitea/pull/36349"
    },
    {
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/go-gitea/gitea/releases/tag/v1.25.4"
    },
    {
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
      "tags": [
        "Broken Link"
      ],
      "url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-rrq5-r9h5-pc7c"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/security/cve/CVE-2026-20897"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2432204"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20897.json"
    }
  ],
  "sourceIdentifier": "88ee5874-cf24-4952-aea0-31affedb7ff2",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        },
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ],
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "type": "Secondary"
    }
  ]
}

GHSA-393C-QGVJ-3XPH

Vulnerability from github – Published: 2026-01-23 00:31 – Updated: 2026-01-23 20:14

Summary

Gitea does not properly validate repository ownership when deleting Git LFS locks

Details

Gitea does not properly validate repository ownership when deleting Git LFS locks. A user with write access to one repository may be able to delete LFS locks belonging to other repositories.

Severity

5.3 (Medium)


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

Show details on source website

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/go-gitea/gitea"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.25.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-20897"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-23T20:14:46Z",
    "nvd_published_at": "2026-01-22T22:16:18Z",
    "severity": "MODERATE"
  },
  "details": "Gitea does not properly validate repository ownership when deleting Git LFS locks. A user with write access to one repository may be able to delete LFS locks belonging to other repositories.",
  "id": "GHSA-393c-qgvj-3xph",
  "modified": "2026-01-23T20:14:46Z",
  "published": "2026-01-23T00:31:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20897"
    },
    {
      "type": "WEB",
      "url": "https://github.com/go-gitea/gitea/pull/36344"
    },
    {
      "type": "WEB",
      "url": "https://github.com/go-gitea/gitea/pull/36349"
    },
    {
      "type": "WEB",
      "url": "https://github.com/go-gitea/gitea/commit/da036f3f35ca830b22cf4480912ed261303b798f"
    },
    {
      "type": "WEB",
      "url": "https://blog.gitea.com/release-of-1.25.4"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/go-gitea/gitea"
    },
    {
      "type": "WEB",
      "url": "https://github.com/go-gitea/gitea/releases/tag/v1.25.4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Gitea does not properly validate repository ownership when deleting Git LFS locks"
}

WID-SEC-W-2026-0200

Vulnerability from csaf_certbund - Published: 2026-01-22 23:00 - Updated: 2026-02-08 23:00

Summary

Gitea: Mehrere Schwachstellen

Severity

Hoch

Scope

9 vulnerabilities in this advisory, including CVE-2026-20897.

CVE-2026-20897

Known affected: 2 products

Open the full advisory

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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

CVE-2026-20897 (GCVE-0-2026-20897)

bit-gitea-2026-20897

Vulnerability from bitnami_vulndb

FKIE_CVE-2026-20897

GHSA-393C-QGVJ-3XPH

WID-SEC-W-2026-0200

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Nomenclature

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