CVE-2026-73535 (GCVE-0-2026-73535)

Vulnerability from cvelistv5 – Published: 2026-10-14 14:37 – Updated: 2026-10-14 14:37
VLAI
Title
Gitea second-factor bypass through OpenID identity linking
Summary
Gitea's OpenID connect handler accepts a user's password without enforcing enrolled TOTP or WebAuthn verification before completing sign-in and linking an OpenID identifier. When OpenID sign-in is enabled, an attacker who knows the victim's password can obtain a session and link an attacker-controlled identifier. The attacker can then sign in through that identifier without the victim's password or second factor, and a password change does not remove the link.
Severity
No CVSS data available.
CWE
  • CWE-304 - Missing Critical Step in Authentication
  • CWE-696 - Incorrect Behavior Order
Assigner
Gitea CNA under the mitre root
CNA scorecard C 61/100 over 153 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Gitea Gitea Affected: 0 , ≤ 1.27.1 (semver)
guessed Create a notification for this product.
Credits
https://github.com/r0hanSH https://github.com/cyberlanc3r
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "packageName": "gitea.dev",
          "product": "Gitea",
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          "versions": [
            {
              "lessThanOrEqual": "1.27.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "https://github.com/r0hanSH"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "https://github.com/cyberlanc3r"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Gitea\u0027s OpenID connect handler accepts a user\u0027s password without enforcing enrolled TOTP or WebAuthn verification before completing sign-in and linking an OpenID identifier. When OpenID sign-in is enabled, an attacker who knows the victim\u0027s password can obtain a session and link an attacker-controlled identifier. The attacker can then sign in through that identifier without the victim\u0027s password or second factor, and a password change does not remove the link."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-304",
              "description": "CWE-304: Missing Critical Step in Authentication",
              "lang": "en",
              "type": "CWE"
            },
            {
              "cweId": "CWE-696",
              "description": "CWE-696: Incorrect Behavior Order",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-14T14:37:39.073Z",
        "orgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
        "shortName": "Gitea"
      },
      "references": [
        {
          "name": "GitHub Security Advisory GHSA-8xjr-x7rg-hp5h",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-8xjr-x7rg-hp5h"
        },
        {
          "name": "Gitea 1.27.2 release announcement",
          "tags": [
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          ],
          "url": "https://blog.gitea.com/release-of-1.27.2/"
        },
        {
          "name": "Fix: go-gitea/gitea pull request #38805",
          "tags": [
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          "url": "https://github.com/go-gitea/gitea/pull/38805"
        },
        {
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          "tags": [
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          "url": "https://github.com/go-gitea/gitea/pull/38810"
        },
        {
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          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/go-gitea/gitea/releases/tag/v1.27.2"
        }
      ],
      "title": "Gitea second-factor bypass through OpenID identity linking"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
    "assignerShortName": "Gitea",
    "cveId": "CVE-2026-73535",
    "datePublished": "2026-10-14T14:37:39.073Z",
    "dateReserved": "2026-08-13T16:50:58.701Z",
    "dateUpdated": "2026-10-14T14:37:39.073Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-73535",
      "date": "2026-10-15",
      "epss": "0.002",
      "percentile": "0.0925"
    },
    "nvd": {
      "cve": {
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                "defaultStatus": "unaffected",
                "packageName": "gitea.dev",
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            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2"
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        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Gitea\u0027s OpenID connect handler accepts a user\u0027s password without enforcing enrolled TOTP or WebAuthn verification before completing sign-in and linking an OpenID identifier. When OpenID sign-in is enabled, an attacker who knows the victim\u0027s password can obtain a session and link an attacker-controlled identifier. The attacker can then sign in through that identifier without the victim\u0027s password or second factor, and a password change does not remove the link."
          }
        ],
        "id": "CVE-2026-73535",
        "lastModified": "2026-10-14T16:04:39.483",
        "metrics": {},
        "published": "2026-10-14T15:17:23.517",
        "references": [
          {
            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
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          }
        ],
        "sourceIdentifier": "88ee5874-cf24-4952-aea0-31affedb7ff2",
        "vulnStatus": "Deferred",
        "weaknesses": [
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                "lang": "en",
                "value": "CWE-304"
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              {
                "lang": "en",
                "value": "CWE-696"
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            ],
            "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}



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