Gitea external renderer argument injection and code execution

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-73539
StatePUBLISHED
AssignerGitea
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-14 15:17:23 UTC
Updated2026-10-18 14:16:55 UTC
DescriptionGitea 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from ADP

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-88 | CWE-88 CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED7.5HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.5HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Gitea Gitea affected 1.27.1 semver Not specified

References

ReferenceSourceLinkTags
blog.gitea.com/release-of-1.27.2 88ee5874-cf24-4952-aea0-31affedb7ff2 blog.gitea.com
github.com/go-gitea/gitea/security/advisories/GHSA-579w-82gf-89m2 88ee5874-cf24-4952-aea0-31affedb7ff2 github.com
github.com/go-gitea/gitea/pull/38885 88ee5874-cf24-4952-aea0-31affedb7ff2 github.com
github.com/go-gitea/gitea/pull/38898 88ee5874-cf24-4952-aea0-31affedb7ff2 github.com
github.com/go-gitea/gitea/releases/tag/v1.27.2 88ee5874-cf24-4952-aea0-31affedb7ff2 github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: https://github.com/DshtAnger (en)

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