Bug 2536980

Summary:	CVE-2026-91986 rust: gix-transport: Information disclosure and virtual host spoofing via control character injection [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Marian Rehak <mrehak>
Component:	rust	Assignee:	Rust SIG <rust-sig>
Status:	CLOSED NOTABUG	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	amulhern, igor.raits, jchecahi, jistone, paumurph, rust-sig
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["d15c6690-8fb6-41e5-a515-0dd7c1e8c5f5"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-09-18 17:08:14 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2533967

Description Marian Rehak 2026-09-18 11:23:23 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

gitoxide gix-transport before 0.59.2 fails to filter control characters in git-daemon connect requests, allowing attackers to inject NUL/CR/LF bytes via crafted git URLs. Attackers can inject extra NUL-delimited protocol fields to spoof virtual hosts or inject newlines into daemon requests and logs.

Comment 1 Josh Stone 2026-09-18 17:08:14 UTC

Cargo's implementation to use gitoxide for fetching is behind an unstable option, so it is not officially supported.

Furthermore, the build manifest is considered a trusted input, so there's no attacker control of git URLs here.