Denial of Service Vulnerability in Gitoxide gix-mailmap Product
CVE-2026-109348

5.3MEDIUM

Key Information:

Vendor

Gitoxidelabs

Status
Gix-mailmap
Vendor
CVE Published:
12 October 2026

What is CVE-2026-109348?

The gix-mailmap component of Gitoxide prior to version 0.35.0 is vulnerable to a denial of service attack due to inefficient parsing of crafted .mailmap files. This vulnerability allows attackers to create .mailmap entries ordered in a specific manner that results in quadratic-time parsing. Consequently, operations that rely on this parsing, such as log, blame, or shortlog commands, can cause excessive CPU usage, potentially freezing the application and impacting productivity.

Affected Version(s)

gix-mailmap 0 < 0.35.0

gix-mailmap 0.35.0

References

https://github.com/GitoxideLabs/gitoxide/security/advisor...
vendor-advisory
https://www.vulncheck.com/advisories/gitoxide-gix-mailmap...
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

NotAFlightRisk
.