CVE-2026-73278 (GCVE-0-2026-73278)

Vulnerability from cvelistv5 – Published: 2026-10-06 19:33 – Updated: 2026-10-06 19:33
VLAI
Title
Gitea WebAuthn bypass during OAuth and OIDC sign-in
Summary
Gitea's OAuth2 and OpenID Connect sign-in paths do not require a WebAuthn challenge when WebAuthn is the account's only configured second factor. A party able to authenticate through the affected external identity flow can obtain a full session without the passkey verification enforced during password login. One affected path can also persist an external identity link, extending the compromise beyond the initial session; accounts with TOTP configured are outside the reported WebAuthn-only scenario.
Severity
No CVSS data available.
CWE
  • CWE-287 - Improper Authentication
Impacted products
Vendor Product Version
Gitea Gitea Affected: 1.16.0 , ≤ 1.27.1 (semver)
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageName": "gitea.dev",
          "product": "Gitea",
          "vendor": "Gitea",
          "versions": [
            {
              "lessThanOrEqual": "1.27.1",
              "status": "affected",
              "version": "1.16.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "https://github.com/MindflareX"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "https://github.com/AdamKorcz"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "https://github.com/jaeyoon-kim-dev"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Gitea\u0027s OAuth2 and OpenID Connect sign-in paths do not require a WebAuthn challenge when WebAuthn is the account\u0027s only configured second factor. A party able to authenticate through the affected external identity flow can obtain a full session without the passkey verification enforced during password login. One affected path can also persist an external identity link, extending the compromise beyond the initial session; accounts with TOTP configured are outside the reported WebAuthn-only scenario."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287: Improper Authentication",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-06T19:33:54.375Z",
        "orgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
        "shortName": "Gitea"
      },
      "references": [
        {
          "name": "GitHub Security Advisory GHSA-92j2-6qcg-c28c",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-92j2-6qcg-c28c"
        },
        {
          "name": "Gitea 1.27.2 release announcement",
          "tags": [
            "release-notes"
          ],
          "url": "https://blog.gitea.com/release-of-1.27.2/"
        },
        {
          "name": "Fix: go-gitea/gitea pull request #38805",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/go-gitea/gitea/pull/38805"
        },
        {
          "name": "Fix: go-gitea/gitea pull request #38810",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/go-gitea/gitea/pull/38810"
        },
        {
          "name": "go-gitea/gitea v1.27.2 release",
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/go-gitea/gitea/releases/tag/v1.27.2"
        }
      ],
      "title": "Gitea WebAuthn bypass during OAuth and OIDC sign-in"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
    "assignerShortName": "Gitea",
    "cveId": "CVE-2026-73278",
    "datePublished": "2026-10-06T19:33:54.375Z",
    "dateReserved": "2026-08-13T16:50:59.760Z",
    "dateUpdated": "2026-10-06T19:33:54.375Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
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              {
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                "packageName": "gitea.dev",
                "product": "Gitea",
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                    "version": "1.16.0",
                    "versionType": "semver"
                  }
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            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2"
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Gitea\u0027s OAuth2 and OpenID Connect sign-in paths do not require a WebAuthn challenge when WebAuthn is the account\u0027s only configured second factor. A party able to authenticate through the affected external identity flow can obtain a full session without the passkey verification enforced during password login. One affected path can also persist an external identity link, extending the compromise beyond the initial session; accounts with TOTP configured are outside the reported WebAuthn-only scenario."
          }
        ],
        "id": "CVE-2026-73278",
        "lastModified": "2026-10-06T20:17:29.000",
        "metrics": {},
        "published": "2026-10-06T20:17:29.000",
        "references": [
          {
            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
            "url": "https://blog.gitea.com/release-of-1.27.2/"
          },
          {
            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
            "url": "https://github.com/go-gitea/gitea/pull/38805"
          },
          {
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            "url": "https://github.com/go-gitea/gitea/pull/38810"
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            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
            "url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-92j2-6qcg-c28c"
          }
        ],
        "sourceIdentifier": "88ee5874-cf24-4952-aea0-31affedb7ff2",
        "vulnStatus": "Received",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-287"
              }
            ],
            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}



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