Gitea private repository metadata disclosure after access revocation

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

Gitea's starred-repository and tracked-time API endpoints do not re-check current repository permissions before returning data associated with the requesting user. A user whose access to a private repository has been revoked can still retrieve repository metadata through /api/v1/user/starred and private issue titles through /api/v1/user/times. The disclosure depends on relationships or tracked-time entries created before access was revoked.

Source published

14 Oct 2026 14:28:20 UTC

Source modified

14 Oct 2026 15:31:06 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

CVE Program Terms of Use

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

Gitea's starred-repository and tracked-time API endpoints do not re-check current repository permissions before returning data associated with the requesting user. A user whose access to a private repository has been revoked can still retrieve repository metadata through /api/v1/user/starred and private issue titles through /api/v1/user/times. The disclosure depends on relationships or tracked-time entries created before access was revoked.

Source published

Oct 14, 2026, 2:28:20 PM (timezone not stated)

Source modified

Oct 14, 2026, 3:31:06 PM (timezone not stated)

Observed here

9 Nov 2026 14:08:01 UTC

Source terms

ENISA EUVD · source terms and attribution apply

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 3.1 · 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Gitea's starred-repository and tracked-time API endpoints do not re-check current repository permissions before returning data associated with the requesting user. A user whose access to a private repository has been revoked can still retrieve repository metadata through /api/v1/user/starred and private issue titles through /api/v1/user/times. The disclosure depends on relationships or tracked-time entries created before access was revoked.

Source published

14 Oct 2026 15:17:20 UTC

Source modified

14 Oct 2026 16:17:46 UTC

Observed here

25 Oct 2026 14:19:22 UTC

Source terms

NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · 134c704f-9b21-4f2e-91b3-4a467353bcc0 · Secondary · 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

## Summary CVE-2026-20800 fixed private-info leakage to revoked users only for the notification endpoint. Two sibling endpoints that return data keyed on the caller's own relationship still do not re-check repo access at output time: - `GET /api/v1/user/starred` — `getStarredRepos()` computes a per-repo permission but still lists every starred repo (no filtering), so the full repo object (`full_name`, `private`, `clone_url`, `ssh_url`) of a now-inaccessible private repo is returned. - `GET /api/v1/user/times` — `ListMyTrackedTimes()` queries by `UserID` only and `LoadAttributes` brings in the issue (`title`, `state`), leaking private issue titles after revocation. ## Steps to reproduce Using the provided reproduction materials, as a revoked user: 1. Control: `GET /api/v1/repos/admin/starred-test` → **404**. 2. `GET /api/v1/user/starred` → leaks `admin/starred-test`, `private:true`, `clone_url`. 3. `GET /api/v1/user/times` → leaks `issue.title = "SECRET: …"`, `state`. (Runtime-confirmed on `gitea/gitea:1.25.4`. Oracle = planted sentinel title; no real secret exfiltrated.) ## Impact A former collaborator can enumerate private repos they starred and read private issue titles they logged time on, indefinitely after access revocation. Metadata only (no repo content / comment bodies). Low. ## Suggested remediation 1. `getStarredRepos`: drop (or minimally redact) repos where `permission.HasAnyUnitAccessOrPublicAccess()` is false for the caller. 2. `ListMyTrackedTimes`: filter tracked-time entries by current repo access. 3. Optionally clear a user's stars / time entries for a private repo on revocation. ## Credit Reported as part of an incomplete-patch measurement study (responsible disclosure).

Source published

21 Jul 2026 20:13:03 UTC

Source modified

27 Jul 2026 17:11:25 UTC

Observed here

24 Oct 2026 13:19:41 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Publisher rating · MODERATE

Gitea CVE-2026-20800 sibling endpoints not covered: revoked user still reads private repo objects via `/api/v1/user/starred` and private issue titles via `/api/v1/user/times` in gitea.dev

Source published

27 Jul 2026 15:32:45 UTC

Source modified

27 Jul 2026 17:00:24 UTC

Observed here

24 Oct 2026 13:19:41 UTC

Source terms

OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.