Vulnerability-Lookup

FKIE_CVE-2026-101023

Vulnerability from fkie_nvd - Published: 2026-10-06 22:16 - Updated: 2026-10-07 13:45

Severity

Summary

Gitea's OAuth2 token endpoint verified the signature and grant of a token submitted with the `refresh_token` grant type, but not that the token was a refresh token. An unexpired access token for the same OAuth2 application and grant could be exchanged for a new access token and refresh token. Whoever holds such an access token could keep access beyond the token's original lifetime.

References

	URL	Tags
	88ee5874-cf24-4952-aea0-31affedb7ff2	https://blog.gitea.com/release-of-28.1.0/
	88ee5874-cf24-4952-aea0-31affedb7ff2	https://github.com/go-gitea/gitea/pull/39501
	88ee5874-cf24-4952-aea0-31affedb7ff2	https://github.com/go-gitea/gitea/pull/39507
	88ee5874-cf24-4952-aea0-31affedb7ff2	https://github.com/go-gitea/gitea/releases/tag/v28.1.0
	88ee5874-cf24-4952-aea0-31affedb7ff2	https://github.com/go-gitea/gitea/security/advisories/GHSA-469m-x4mw-38r3

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageName": "gitea.dev",
          "product": "Gitea",
          "vendor": "Gitea",
          "versions": [
            {
              "lessThanOrEqual": "28.0.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Gitea\u0027s OAuth2 token endpoint verified the signature and grant of a token submitted with the `refresh_token` grant type, but not that the token was a refresh token. An unexpired access token for the same OAuth2 application and grant could be exchanged for a new access token and refresh token. Whoever holds such an access token could keep access beyond the token\u0027s original lifetime."
    }
  ],
  "id": "CVE-2026-101023",
  "lastModified": "2026-10-07T13:45:36.947",
  "metrics": {},
  "published": "2026-10-06T22:16:59.737",
  "references": [
    {
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
      "url": "https://blog.gitea.com/release-of-28.1.0/"
    },
    {
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
      "url": "https://github.com/go-gitea/gitea/pull/39501"
    },
    {
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
      "url": "https://github.com/go-gitea/gitea/pull/39507"
    },
    {
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
      "url": "https://github.com/go-gitea/gitea/releases/tag/v28.1.0"
    },
    {
      "source": "88ee5874-cf24-4952-aea0-31affedb7ff2",
      "url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-469m-x4mw-38r3"
    }
  ],
  "sourceIdentifier": "88ee5874-cf24-4952-aea0-31affedb7ff2",
  "vulnStatus": "Awaiting Analysis"
}

CVE-2026-101023 (GCVE-0-2026-101023)

Vulnerability from cvelistv5 – Published: 2026-10-06 21:34 – Updated: 2026-10-07 20:04

Title

Gitea OAuth2 refresh token grant accepts access tokens

Summary

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 2026-10-07 20:03 UTC

CWE

CWE-287 - Improper Authentication

Assigner

Gitea mitre root Scorecard

References

5 references

URL	Tags
https://github.com/go-gitea/gitea/security/adviso…	vendor-advisory
https://github.com/go-gitea/gitea/pull/39501	patch
https://github.com/go-gitea/gitea/pull/39507	patch
https://blog.gitea.com/release-of-28.1.0/	release-notes
https://github.com/go-gitea/gitea/releases/tag/v28.1.0	release-notes

Impacted products

1 product

Vendor	Product	Version
Gitea	Gitea	Affected: 0 , ≤ 28.0.0 (semver)

Credits

https://github.com/rezmoss https://github.com/manus-use https://github.com/danieltk76 https://github.com/gigioneggiando https://github.com/DshtAnger https://github.com/manus-pi https://github.com/silverwind https://github.com/bircni

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-101023",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-07T20:03:22.628993Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-287",
                "description": "CWE-287 Improper Authentication",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-07T20:04:04.946Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageName": "gitea.dev",
          "product": "Gitea",
          "vendor": "Gitea",
          "versions": [
            {
              "lessThanOrEqual": "28.0.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "https://github.com/rezmoss"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "https://github.com/manus-use"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "https://github.com/danieltk76"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "https://github.com/gigioneggiando"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "https://github.com/DshtAnger"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "https://github.com/manus-pi"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "https://github.com/silverwind"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "https://github.com/bircni"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Gitea\u0027s OAuth2 token endpoint verified the signature and grant of a token submitted with the `refresh_token` grant type, but not that the token was a refresh token. An unexpired access token for the same OAuth2 application and grant could be exchanged for a new access token and refresh token. Whoever holds such an access token could keep access beyond the token\u0027s original lifetime."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-06T21:34:53.642Z",
        "orgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
        "shortName": "Gitea"
      },
      "references": [
        {
          "name": "GitHub Security Advisory GHSA-469m-x4mw-38r3",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-469m-x4mw-38r3"
        },
        {
          "name": "Fix: go-gitea/gitea pull request #39501",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/go-gitea/gitea/pull/39501"
        },
        {
          "name": "Fix backport to release/v28: go-gitea/gitea pull request #39507",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/go-gitea/gitea/pull/39507"
        },
        {
          "name": "Gitea 28.1.0 release announcement",
          "tags": [
            "release-notes"
          ],
          "url": "https://blog.gitea.com/release-of-28.1.0/"
        },
        {
          "name": "go-gitea/gitea v28.1.0 release",
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/go-gitea/gitea/releases/tag/v28.1.0"
        }
      ],
      "title": "Gitea OAuth2 refresh token grant accepts access tokens"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "88ee5874-cf24-4952-aea0-31affedb7ff2",
    "assignerShortName": "Gitea",
    "cveId": "CVE-2026-101023",
    "datePublished": "2026-10-06T21:34:53.642Z",
    "dateReserved": "2026-10-04T22:02:04.874Z",
    "dateUpdated": "2026-10-07T20:04:04.946Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.

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FKIE_CVE-2026-101023

CVE-2026-101023 (GCVE-0-2026-101023)

Tags

Sightings

Nomenclature

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