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Fencer Intel
medium 5.4

CVE-2026-91986 json

gitoxide gix-transport before 0.59.2 CR/LF/NUL Injection

published 2mo ago modified last mo. also EUVD-2026-78657 , GHSA-rc7h-wp5f-w3g5

Unreviewed: the maintainers' own advisory

Published by the maintainers on their GitHub repository GitoxideLabs/gitoxide. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

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 virtual hosts or inject newlines into daemon requests and logs.

Patch / fix

  • GitoxideLabs gitoxide 0.59.2
  • stgit openSUSE Leap 16.0 2.7.0-bp160.1.1
  • stgit openSUSE Tumbleweed 2.7.0-1.1
  • gitoxide openSUSE Leap 16.0 0.60.0-bp160.1.1
  • openai-codex openSUSE Tumbleweed 0.158.0-1.1
  • gitoxide openSUSE Leap 16.0 0.56.0-bp160.2.1
  • gitoxide openSUSE Tumbleweed 0.58.0-2.1

opensuse advisories openSUSE-SU-2026:22204-1openSUSE-SU-2026:12223-1openSUSE-SU-2026:22126-1openSUSE-SU-2026:11923-1openSUSE-SU-2026:21955-1openSUSE-SU-2026:11857-1

Is CVE-2026-91986 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-91986 updated cvss 5.4

gix-transport: gix-transport: Information disclosure and virtual host spoofing via control character injection

  • Red Hat Enterprise Linux 8 rls, rust, cargo, clippy, rustfmt, rust-gdb, +8 more Red Hat Enterprise Linux 9 rust, cargo, clippy, rustfmt, rust-gdb, rust-src, +9 more Red Hat Enterprise Linux 10 igvm 0.4.0-3.el10, rust 1.98.1-1.el10 Red Hat Enterprise Linux AI (RHEL AI) 3 rust 1.98.1-1.el10
    affected: no fix available “Fix deferred”
  • Red Hat Hardened Images rust 1.98.1-1.el10, openshell 0.0.100-0.2.hum1
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
last mo.

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-11).

Exploits and checks

  • github.com https://github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-rc7h-wp5f-w3g5 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CNA 4.0 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Inferred packages

No advisory lists a package for this vulnerability yet. The CVE names these as products and links their GitHub repository, and the package registry names the same repository, so they are probably the affected packages. Low confidence: the versions are the CVE’s own for the product, and a stack check reports the package as unchecked when there are none.

ecosystem package repository affected
pypi gitoxide gitoxidelabs/gitoxide no versions given

Affected products

  • GitoxideLabs gitoxide

Classification

Weakness
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of GitoxideLabs/gitoxide published their own advisory on GitHub. Reviewed sources take precedence over it.