Gitea Remote Code Execution (RCE)

published 2018-11-04 8y ago modified 2026-06-17 4mo ago also GHSA-hf6f-jq25-8gq9 , GO-2022-0844 , EUVD-2022-1042

cvss: 9.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 3.0%; EPSS 3.0% chance of exploitation in 30 days, percentile 87%
public exploits: 0; none known

Gitea before 1.5.4 allows remote code execution because it does not properly validate session IDs. This is related to session ID handling in the go-macaron/session code for Macaron.

Patch / fix

fixed in 2 links 3

go code.gitea.io/gitea 1.5.2
gitea gitea 1.5.4

github.com/go-gitea/gitea@aeb5655 commit
github.com/go-gitea/gitea#5177 pull request
github.com/go-gitea/gitea/issues/5140 advisory

Is CVE-2018-18926 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

3.04% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
go	code.gitea.io/gitea	<1.5.2	1.5.2

Classification

Weakness

CWE-384 Session Fixation
CWE-94 Improper Control of Generation of Code

References

github.com /go-gitea/gitea/issues/5140
web, mitigation, patch, third-party-advisory
github.com /go-gitea/gitea/pull/5177
web
github.com /go-gitea/gitea/commit/aeb5655c25053bdcd7eee94ea37df88468374162
web
nvd.nist.gov /vuln/detail/CVE-2018-18926
advisory
github.com /advisories/GHSA-hf6f-jq25-8gq9
advisory

Sources

Fencer Intel 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.