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CVE-2026-109348— Gitoxide gix-mailmap before 0.35.0 CPU Denial of Service via .mailmap Parsing

Quick assessment

Affected
GitoxideLabs gix-mailmap
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

gix-mailmap 版本低于 0.35.0 的 Gitoxide 存在一个拒绝服务漏洞，攻击者可以通过在 中执行二次时间复杂度的解析操作，耗尽 CPU 资源。攻击者可以提交一个经过精心构造的 文件，其中包含降序排列的条目，从而迫使重复的前插入操作，导致运行 、 或 的工作进程被阻塞数分钟。

CVSS 4.3 · Medium EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 2

VendorProduct Version RangeStatus
GitoxideLabs gix-mailmap < 0.35.0 affected
0.35.0 unaffected
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I. Basic Information for CVE-2026-109348

Vulnerability Information
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Vulnerability Title
Gitoxide gix-mailmap before 0.35.0 CPU Denial of Service via .mailmap Parsing
Source: CVE Program / CVE List V5
Vulnerability Description
Gitoxide gix-mailmap before 0.35.0 contains a denial of service vulnerability that allows attackers to exhaust CPU through quadratic-time parsing in Snapshot::from_bytes. Attackers can commit a crafted .mailmap with descending-ordered entries forcing repeated front inserts, blocking workers running log, blame, or shortlog for minutes.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitoxideLabs gix-mailmap 0 ~ 0.35.0 -

II. Public POCs for CVE-2026-109348

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III. Intelligence Information for CVE-2026-109348

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Vendor Advisories for CVE-2026-109348 (2)

Same Patch Batch · GitoxideLabs · 2026-10-12 · 4 CVEs total

CVE-2026-109351 6.5 MEDIUM Gitoxide gix-pack before 0.75.0 Denial of Service via Pack Header Object Count
CVE-2026-109350 6.5 MEDIUM Gitoxide gix-pack before 0.75.0 Denial of Service via OFS_DELTA Base Distance
CVE-2026-109349 6.5 MEDIUM gix-pack before 0.75.0 Reachable Assertion DoS via Pack Version 3 Header

IV. Related Vulnerabilities

Same vendor: GitoxideLabs
Same weakness: CWE-407

V. Comments for CVE-2026-109348

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