CVE-2026-20897

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A user with write access to one repository may be able to delete LFS locks belonging to other repositories."}, {"lang": "es", "value": "Gitea no valida correctamente la propiedad del repositorio al eliminar bloqueos de Git LFS. Un usuario con acceso de escritura a un repositorio podr\u00eda eliminar bloqueos LFS pertenecientes a otros repositorios."}], "id": "CVE-2026-20897", "lastModified": "2026-07-15T02:18:24.600", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "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"}]}

{"bugzilla": {"description": "gitea: Gitea Git LFS Lock Deletion Broken Access Control (Cross-Repo IDOR)", "id": "2432204", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2432204"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "(CWE-284|CWE-639)", "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."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-20897", "package_state": [{"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Not affected", "package_name": "openshift-pipelines/pipelines-opc-rhel9", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Not affected", "package_name": "openshift-pipelines/pipelines-pipelines-as-code-cli-rhel8", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Not affected", "package_name": "openshift-pipelines/pipelines-pipelines-as-code-cli-rhel9", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Not affected", "package_name": "openshift-pipelines/pipelines-pipelines-as-code-controller-rhel8", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Not affected", "package_name": "openshift-pipelines/pipelines-pipelines-as-code-controller-rhel9", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Not affected", "package_name": "openshift-pipelines/pipelines-pipelines-as-code-watcher-rhel8", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Not affected", "package_name": "openshift-pipelines/pipelines-pipelines-as-code-watcher-rhel9", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Not affected", "package_name": "openshift-pipelines/pipelines-pipelines-as-code-webhook-rhel8", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Not affected", "package_name": "openshift-pipelines/pipelines-pipelines-as-code-webhook-rhel9", "product_name": "OpenShift Pipelines"}], "public_date": "2026-01-22T22:01:51Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-20897\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-20897\nhttps://blog.gitea.com/release-of-1.25.4/\nhttps://github.com/go-gitea/gitea/pull/36344\nhttps://github.com/go-gitea/gitea/pull/36349\nhttps://github.com/go-gitea/gitea/releases/tag/v1.25.4\nhttps://github.com/go-gitea/gitea/security/advisories/GHSA-rrq5-r9h5-pc7c"], "threat_severity": "Critical"}

{"analysis": {"en": {"generated_at": "2026-04-18T15:22:44.720828+00:00", "value": {"mitigation_remediation": ["Upgrade Gitea to version 1.25.4 or later to apply the patch that enforces proper ownership checks on LFS lock deletion.", "Re\u2011audit repository permissions to ensure that only authorized users are granted write access, reducing the risk of cross\u2011repository lock manipulation.", "Enable and review Gitea log monitoring for LFS lock deletion events to detect unauthorized attempts during the transition period."], "summary": {"action": "Immediate Patch", "impact": "Authorization bypass allows deletion of Git LFS locks across repositories"}, "threat_synthesis": {"affected_systems": "The flaw affects installations of the Gitea open source Git server. No specific version range is listed in the CNA data; however, the advisory references the release of v1.25.4, which contains the fix, indicating that earlier releases are vulnerable. No other vendors or products are explicitly mentioned.", "description_and_impact": "The vulnerability permits a user with write access to a repository to delete Git LFS locks that belong to other repositories, effectively bypassing repository ownership checks. This results in unauthorized modification of lock state, which can disrupt collaboration, compromise the integrity of the project history, and facilitate further attacks such as arbitrary code execution within the repository. The weakness is classified as CWE-284 (Improper Authorization) and CWE-639 (Privilege Escalation through Privilege Validation Errors).", "risk_and_exploitability": "With a CVSS base score of 9.1, the severity is high. The EPSS score is less than 1%, suggesting that the likelihood of exploitation in the wild is low at this moment, and the vulnerability is not currently listed in CISA's Known Exploited Vulnerabilities catalog. Exploitation requires only authenticated access with write permission to a repository; the attack path is via standard HTTP API calls to delete locks, with no additional privilege escalation needed. The attack vector is inferred to be remote access over the web interface or API."}}}}, "created": "2026-01-23T10:27:25.058598+00:00", "updated": "2026-04-18T15:30:03.956070+00:00", "vendors": ["gitea", "gitea$PRODUCT$gitea"]}