Gogs: Open Redirect via redirect_to in Gogs

published 2026-06-23 4 mo ago modified 2026-07-21 3 mo ago also GHSA-xxhq-69mf-w8cr , GO-2026-5773 , EUVD-2026-39068

cvss: 5.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 46%
public exploits: 0; none known

Gogs is an open source self-hosted Git service. Prior to 0.14.3, an open redirect vulnerability exists in Gogs where attacker-controlled redirect_to parameters can bypass validation, allowing redirection to arbitrary external sites. All redirects in Gogs that are validated via the IsSameSite function are vulnerable. The function only inspects the first two characters of the URL string. This check fails to account for directory traversal sequences followed by backslashes. This vulnerability is fixed in 0.14.3.

Patch / fix

fixed in 1 distros 1 links 3

go gogs.io/gogs 0.14.3

govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1

opensuse advisories openSUSE-SU-2026:21483-1

github.com/gogs/gogs@c5da963 commit
github.com/gogs/gogs#8322 pull request
github.com/gogs/gogs/releases/tag/v0.14.3 release

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 4 mo ago (2026-06-25)

Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/gogs/gogs/security/advisories/GHSA-xxhq-69mf-w8cr referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
GitHub	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
go	gogs.io/gogs	<0.14.3 all versions	0.14.3

Affected products

gogs gogs

Classification

Weakness

CWE-601 URL Redirection to Untrusted Site

References

github.com /gogs/gogs/pull/8322
web
github.com /gogs/gogs/commit/c5da9631dc75f692f313373ae229c4d47ba6517f
web
github.com /gogs/gogs/security/advisories/GHSA-xxhq-69mf-w8cr
exploit, web, advisory
github.com /gogs/gogs/releases/tag/v0.14.3
web
nvd.nist.gov /vuln/detail/CVE-2026-52802
advisory
github.com /gogs/gogs
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary