CVE-2026-45571 | go-git: Crafted repositories may modify main and submodule .git directories

go-git is an extensible git implementation library written in pure Go. Prior to 5.19.1 and 6.0.0-alpha.4, a path validation issue in go-git could allow crafted repository data to affect files outside the intended checkout target, including the repository's .git directory. These validations were introduced in upstream Git years ago, so the vulnerability arose from go-git drifting from those checks. This vulnerability is fixed in 5.19.1 and 6.0.0-alpha.4.

Published: 2026-05-27 Last update: 2026-06-04 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-45571 is rated Low Risk (22.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.01%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-45571

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-28 — 0.01% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-45571

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.4 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.8 2.5 [email protected]

Weakness enumeration for CVE-2026-45571

GitHub Security Advisory for CVE-2026-45571

GHSA-crhj-59gh-8x96 · Severity: medium · Ecosystem: go — go-git: Crafted repositories may modify main and submodule .git directories

OS Trackers for CVE-2026-45571

vendor priority summary link
debian not yet assigned CVE-2026-45571 not yet assigned priority: Debian including 2 source packages (golang-github-go-git-go-git, golang-github-go-git-go-git-v6), 6 status rows across 4 suites (bookworm, forky, sid, trixie): open 3, resolved 3. https://security-tracker.debian.org/tracker/CVE-2026-45571
ubuntu medium CVE-2026-45571 medium priority: Ubuntu including 1 source packages (golang-github-go-git-go-git), 5 status rows across 5 suites (jammy, noble, questing, resolute, upstream): needs-triage 4, released 1. https://ubuntu.com/security/CVE-2026-45571

Affected software / configurations for CVE-2026-45571

Vendor Product Version Raw CPE
go-git_project go-git < 5.19.1 cpe:2.3:a:go-git_project:go-git:*:*:*:*:*:go:*:*
go-git_project go-git 6.0.0 cpe:2.3:a:go-git_project:go-git:6.0.0:alpha1:*:*:*:go:*:*
go-git_project go-git 6.0.0 cpe:2.3:a:go-git_project:go-git:6.0.0:alpha2:*:*:*:go:*:*
go-git_project go-git 6.0.0 cpe:2.3:a:go-git_project:go-git:6.0.0:alpha3:*:*:*:go:*:*

References for CVE-2026-45571

cvelogic Threat Intelligence