CVE-2026-73539Gitea external renderer argument injection and code execution
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No exploitation reported and no EPSS estimate yet.
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Gitea substitutes a URL derived from the markup Context field into external renderer command templates without escaping the reference path before shell-style argument splitting. A crafted Context can inject additional renderer arguments, including options that load executable filter files. On deployments using a susceptible external renderer such as pandoc, a user who can place a filter file at an accessible path can cause it to execute as the Gitea service account; the public repository markup endpoint itself can be reachable without authentication.
- CVSS
- 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-88
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Gitea
- NVD analysis
- Deferred
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Gitea Gitea gitea:gitea (from the name) | through 1.27.1 | CNA record |
References
- https://github.com/go-gitea/gitea/security/advisories/GHSA-579w-82gf-89m2vendor-advisory
- https://blog.gitea.com/release-of-1.27.2/release-notes
- https://github.com/go-gitea/gitea/pull/38885patch
- https://github.com/go-gitea/gitea/pull/38898patch
- https://github.com/go-gitea/gitea/releases/tag/v1.27.2release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.