Gogs: Write to readonly repositories using receive-pack + service=git-upload-pack confusion

published 2026-06-23 4 mo ago modified 2026-11-05 3 d ago also CVE-2026-123012 , GHSA-wmfg-5p4h-5fw3 , GO-2026-5712 , EUVD-2026-39081

cvss: 7.1; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits: 0; none known

Gogs is an open source self-hosted Git service. Prior to 0.14.3, Git smart HTTP authorizes POST …/git-receive-pack using the client-supplied service query string (so ?service=git-upload-pack is evaluated as read access) while routing still runs git receive-pack, allowing push where only read should be allowed. 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@7c9cf53 commit
github.com/gogs/gogs#8331 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

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/gogs/gogs/security/advisories/GHSA-wmfg-5p4h-5fw3 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	7.1	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
CNA	4.0	7.1	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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-284 Improper Access Control

References

github.com /gogs/gogs/pull/8331
web
github.com /gogs/gogs/commit/7c9cf53aca957959bcd98b0cc987d9901b7cb184
web
github.com /gogs/gogs/security/advisories/GHSA-wmfg-5p4h-5fw3
exploit, web, advisory
github.com /gogs/gogs/releases/tag/v0.14.3
web
nvd.nist.gov /vuln/detail/CVE-2026-52810
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