CVE-2026-25779Published

Gitea redirect handling permits open redirects through backslash paths

Collected exploitation and prediction evidence

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.

cve-program · CVE-2026-25779

Published

Gitea versions up to and including 1.25.4 allow redirect bypasses through raw or percent-encoded backslashes in redirect_to values.

Source published: 3 Jul 2026 20:19:33 UTC
Source modified: 7 Jul 2026 16:59:40 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.

euvd · EUVD-2026-41625

Published

Gitea versions up to and including 1.25.4 allow redirect bypasses through raw or percent-encoded backslashes in redirect_to values.

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Jul 3, 2026, 8:19:33 PM

dateUpdated: Jul 7, 2026, 4:59:40 PM

Source published: Jul 3, 2026, 8:19:33 PM (timezone not stated)
Source modified: Jul 7, 2026, 4:59:40 PM (timezone not stated)
Observed here: 7 Nov 2026 05:36:31 UTC
Source terms: ENISA EUVD · source terms and attribution apply

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EUVD CVSS 3.1 · 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

nvd · CVE-2026-25779

Published

Gitea versions up to and including 1.25.4 allow redirect bypasses through raw or percent-encoded backslashes in redirect_to values.

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Deferred

Weakness classifications: CWE-601

Original publisher date fields

published: 2026-07-03T21:16:57.923

lastModified: 2026-10-25T15:10:00.147

Source published: 3 Jul 2026 21:16:57 UTC
Source modified: 25 Oct 2026 15:10:00 UTC
Observed here: 27 Oct 2026 07:23:16 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 · 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

osv · GHSA-j5r2-4c8j-xc3m

Published

### Details Despite the validation within `urlIsRelative` in `modules/httplib/url.go`, an open redirect is still possible due to usage of directory traversal sequences plus a back-slash in the "redirect_to" parameter. ### PoC When a user uses this URL to login: `https://gitea.com/user/login?redirect_to=/a/../\example.com` They would be redirected to `example.com` upon a successful login to their gitea account. ### Impact * Phishing: Attackers can use trusted domain links to redirect victims to credential-harvesting pages * OAuth/SSO Token Theft: In authentication flows, authorization codes or tokens may leak via redirect * Referer Leakage: Sensitive URL parameters may be exposed to attacker domains via the Referer header * Cache Poisoning: In deployments with shared caches, malicious redirects may be cached and served to other users

Source published: 17 Jun 2026 18:10:46 UTC
Source modified: 25 Jun 2026 23:11:06 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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 · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Publisher rating · MODERATE

osv · GO-2026-5448

Published

Gitea: Open Redirect via redirect_to in code.gitea.io/gitea

Source published: 25 Jun 2026 22:34:31 UTC
Source modified: 25 Jun 2026 23:00:17 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.