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CVE-2026-109351— Gitoxide gix-pack before 0.75.0 Denial of Service via Pack Header Object Count

Quick assessment

Affected
GitoxideLabs gix-pack
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.

在 Gitoxide 的 gix-pack 模块（版本低于 0.75.0）中，存在一个不受控制的内存分配漏洞。远程攻击者通过构造包含极大 pack-header 对象计数的恶意数据包，可导致目标进程被中止。具体而言，恶意远程服务器可以提供一个 12 字节的 pack 头部，声称包含 0xFFFFFFFF 个对象，从而触发 Tree::with_capacity 方法分配数百吉字节的内存，最终导致克隆（clone）或获取（fetch）操作崩溃。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 2

VendorProduct Version RangeStatus
GitoxideLabs gix-pack < 0.75.0 affected
0.75.0 unaffected
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I. Basic Information for CVE-2026-109351

Vulnerability Information
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Vulnerability Title
Gitoxide gix-pack before 0.75.0 Denial of Service via Pack Header Object Count
Source: CVE Program / CVE List V5
Vulnerability Description
Gitoxide gix-pack before 0.75.0 contains an uncontrolled memory allocation vulnerability that allows remote attackers to abort the process by supplying a huge pack-header object count. Malicious remotes can serve a 12-byte pack header claiming 0xFFFFFFFF objects, forcing Tree::with_capacity to reserve hundreds of gigabytes and crash clone or fetch operations.
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:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitoxideLabs gix-pack 0 ~ 0.75.0 -

II. Public POCs for CVE-2026-109351

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III. Intelligence Information for CVE-2026-109351

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Other References for CVE-2026-109351 (2)

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

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
CVE-2026-109348 4.3 MEDIUM Gitoxide gix-mailmap before 0.35.0 CPU Denial of Service via .mailmap Parsing

IV. Related Vulnerabilities

Same product: gix-pack
Same vendor: GitoxideLabs
Same weakness: CWE-770

V. Comments for CVE-2026-109351

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