CVE-2026-109349— gix-pack before 0.75.0 Reachable Assertion DoS via Pack Version 3 Header
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.
gitoxide 库中的 gix-pack 模块在 0.75.0 版本之前存在一个可触发的断言错误，位于 函数中。pack 头部的解码器虽然接受版本号 3，但在发布版本中使用的 宏却要求版本号必须为 2。恶意远程服务器可以发送一个声明版本号为 3 的 12 字节 pack 头部，从而导致客户端 panic 并中止克隆（clone）或拉取（fetch）操作。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| GitoxideLabs | gix-pack | < 0.75.0 |
affected |
0.75.0 |
unaffected |
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I. Basic Information for CVE-2026-109349
Vulnerability Information
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Vulnerability Title
gix-pack before 0.75.0 Reachable Assertion DoS via Pack Version 3 Header
Source: CVE Program / CVE List V5
Vulnerability Description
gitoxide gix-pack before 0.75.0 contains a reachable assertion in BytesToEntriesIter::new_from_header: the pack header decoder accepts version 3, but a release-enabled assert_eq! requires version 2. A malicious remote can send a 12-byte pack header declaring version 3 to panic the client and abort the clone or fetch.
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
可达断言
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-2026-109349
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-109349 (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-2026-109348 | 4.3 MEDIUM | Gitoxide gix-mailmap before 0.35.0 CPU Denial of Service via .mailmap Parsing |
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V. Comments for CVE-2026-109349
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