CVE-2026-113429 (GCVE-0-2026-113429)

Vulnerability from cvelistv5 – Published: 2026-11-01 09:48 – Updated: 2026-11-01 09:48
VLAI
Title
Gitea stored XSS through legacy Actions artifact Content-Encoding
Summary
Legacy (v1 to v3) Actions artifact uploads stored the request's `Content-Encoding` header unchecked in the column that is served as the artifact's `Content-Type` on download, and a value starting with `video/` or `audio/` also removed the sandboxing Content-Security-Policy. A user who can run an Actions job could upload an artifact that a browser renders as HTML on the Gitea origin when the direct artifact download URL is opened, and the URL is reachable anonymously on public repositories. A victim who opens the link runs the attacker's script with their own session, which for an administrator means control of the instance. Legacy uploads now store only the `gzip` marker, and the special serve headers are chosen only for valid media types.
Severity
No CVSS data available.
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
Gitea CNA under the mitre root
CNA scorecard C 61/100 over 185 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Gitea Gitea Affected: 0 , < 28.3.0 (semver)
guessed Create a notification for this product.
Credits
https://github.com/yagcioglutoprak https://github.com/basavaraj-sm05
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageName": "gitea.dev",
          "product": "Gitea",
          "vendor": "Gitea",
          "versions": [
            {
              "lessThan": "28.3.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "https://github.com/yagcioglutoprak"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "https://github.com/basavaraj-sm05"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Legacy (v1 to v3) Actions artifact uploads stored the request\u0027s `Content-Encoding` header unchecked in the column that is served as the artifact\u0027s `Content-Type` on download, and a value starting with `video/` or `audio/` also removed the sandboxing Content-Security-Policy. A user who can run an Actions job could upload an artifact that a browser renders as HTML on the Gitea origin when the direct artifact download URL is opened, and the URL is reachable anonymously on public repositories. A victim who opens the link runs the attacker\u0027s script with their own session, which for an administrator means control of the instance. Legacy uploads now store only the `gzip` marker, and the special serve headers are chosen only for valid media types."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-01T09:48:32.206Z",
        "orgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
        "shortName": "Gitea"
      },
      "references": [
        {
          "name": "GitHub Security Advisory GHSA-9v6p-xpcp-7488",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-9v6p-xpcp-7488"
        },
        {
          "name": "Fix: go-gitea/gitea pull request #39855",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/go-gitea/gitea/pull/39855"
        },
        {
          "name": "Fix backport to release/v28: go-gitea/gitea pull request #39996",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/go-gitea/gitea/pull/39996"
        },
        {
          "name": "Gitea 28.3.0 release announcement",
          "tags": [
            "release-notes"
          ],
          "url": "https://blog.gitea.com/release-of-28.3.0/"
        },
        {
          "name": "go-gitea/gitea v28.3.0 release",
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/go-gitea/gitea/releases/tag/v28.3.0"
        }
      ],
      "title": "Gitea stored XSS through legacy Actions artifact Content-Encoding"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
    "assignerShortName": "Gitea",
    "cveId": "CVE-2026-113429",
    "datePublished": "2026-11-01T09:48:32.206Z",
    "dateReserved": "2026-11-01T08:48:41.162Z",
    "dateUpdated": "2026-11-01T09:48:32.206Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-113429",
      "date": "2026-11-03",
      "epss": "0.00171",
      "percentile": "0.06531"
    },
    "nvd": {
      "cve": {
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            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "packageName": "gitea.dev",
                "product": "Gitea",
                "vendor": "Gitea",
                "versions": [
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                    "lessThan": "28.3.0",
                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
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                ]
              }
            ],
            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2"
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        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Legacy (v1 to v3) Actions artifact uploads stored the request\u0027s `Content-Encoding` header unchecked in the column that is served as the artifact\u0027s `Content-Type` on download, and a value starting with `video/` or `audio/` also removed the sandboxing Content-Security-Policy. A user who can run an Actions job could upload an artifact that a browser renders as HTML on the Gitea origin when the direct artifact download URL is opened, and the URL is reachable anonymously on public repositories. A victim who opens the link runs the attacker\u0027s script with their own session, which for an administrator means control of the instance. Legacy uploads now store only the `gzip` marker, and the special serve headers are chosen only for valid media types."
          }
        ],
        "id": "CVE-2026-113429",
        "lastModified": "2026-11-01T10:18:34.670",
        "metrics": {},
        "published": "2026-11-01T10:18:34.557",
        "references": [
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            "url": "https://github.com/go-gitea/gitea/pull/39996"
          },
          {
            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
            "url": "https://github.com/go-gitea/gitea/releases/tag/v28.3.0"
          },
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            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
            "url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-9v6p-xpcp-7488"
          }
        ],
        "sourceIdentifier": "88ee5874-cf24-4952-aea0-31affedb7ff2",
        "vulnStatus": "Deferred",
        "weaknesses": [
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                "value": "CWE-79"
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            ],
            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}



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