---
id: CVE-2026-91986
title: >-
  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
summary: >-
  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 …
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'
cwe:
  - CWE-74
  - CWE-93
vendor: GitoxideLabs
product: gitoxide
affected:
  - gitoxide < 0.59.2
published: '2026-09-15'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:17:45.270'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91986'
references:
  - url: >-
      https://github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-rc7h-wp5f-w3g5
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/gitoxide-gix-transport-before-0.59.2-cr-lf-nul-injection
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-rc7h-wp5f-w3g5
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91986.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-91986'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2533967'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-91986'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91986'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - exploit-available
epss: 0.00263
epssPercentile: 0.16156
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-21T19:22:03.763119Z'
ingestedAt: '2026-09-15T15:39:12.910Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux AI (RHEL AI) 3 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux AI (RHEL AI) 3 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91986.json)