CVE-2026-91986: gitoxide gix-transport before 0.59.2 CR/LF/NUL Injection

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-15 · updated 2026-09-23
Weakness: CWE-74

Description

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.

Affected products

GitoxideLabs gitoxide: before 0.59.2 — fixed in 0.59.2

How to fix

Upgrade to a fixed version: GitoxideLabs gitoxide 0.59.2. Check the vendor advisory for mitigations.

References

https://github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-rc7h-wp5f-w3g5
https://www.vulncheck.com/advisories/gitoxide-gix-transport-before-0.59.2-cr-lf-nul-injection
https://github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-rc7h-wp5f-w3g5

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