CVE-2026-91986
Received Received - Intake

gitoxide gix-transport NUL/CR/LF Injection in git-daemon

Publication date: 2026-09-15

Last updated on: 2026-09-15

Assigner: VulnCheck

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.

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Meta Information

Published
2026-09-15
Last Modified
2026-09-15
Generated
2026-09-15
AI Q&A
2026-09-15
EPSS Evaluated
N/A
NVD
CVE-2026-91986
EUVD
EUVD-2026-78657

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
gitoxide gix-transport to 0.59.2 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-74 The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

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Executive Summary

The vulnerability in gitoxide gix-transport before 0.59.2 allows attackers to inject control characters like NUL, CR, or LF into git-daemon connect requests via specially crafted git URLs. This bypasses input filtering and enables injection of extra protocol fields or newlines into requests and logs.

Detection Guidance

This vulnerability involves gitoxide gix-transport failing to filter control characters in git-daemon connect requests. Detection would require inspecting network traffic for malformed git URLs containing NUL, CR, or LF bytes, or unusual protocol fields in git-daemon interactions.

Impact Analysis

An attacker could exploit this to spoof virtual hosts by injecting extra NUL-delimited fields or manipulate logs by injecting newlines. This may lead to unauthorized access, data leaks, or log forgery, depending on how the system processes these requests.

Mitigation Strategies

Immediately update gitoxide gix-transport to version 0.59.2 or later to address the control character filtering issue. Additionally, review and restrict access to git-daemon services, monitor logs for suspicious requests, and consider disabling git-daemon if not required.

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