CVE-2026-45571: go-git is an extensible git implementation library written in pure Go

Q: How do I fix CVE-2026-45571?

go-git: upgrade to 5.19.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-45571 being exploited?

CVE-2026-45571 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-45571 affect?

CVE-2026-45571 affects go-git. Severity is medium (CVSS 5.4). 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

Q: How urgent is CVE-2026-45571?

Priority 24/100. No elevated risk signals yet.

Routine

MEDIUM 5.4UPGRADE

CVE-2026-45571 is a medium-severity flaw (CVSS 5.4) affecting go-git. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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-a

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-05-27
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: go-git project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-27 15:16 UTCPublished CVE record published
2026-06-17 10:52 UTCUpdated Record last modified

go-git project go-git UPGRADE

Affected: < 5.19.1 · 6.0.0 alpha1 · 6.0.0 alpha2 · 6.0.0 alpha3

Fixed in: 5.19.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy go-git || rpm -q go-git || go-git --version

2. UPGRADE to 5.19.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade go-git

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade go-git

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-45571?

go-git: upgrade to 5.19.1. Exact commands for each OS are on this page.

Is CVE-2026-45571 being exploited?

CVE-2026-45571 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-45571 affect?

CVE-2026-45571 affects go-git. Severity is medium (CVSS 5.4). 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

How urgent is CVE-2026-45571?

Priority 24/100. No elevated risk signals yet.

Software pages

Git vulnerabilities

Related CVEs

CVE-2026-45570 CRITICAL 9.6 UPGRADE go-git is an extensible git implementation library written in pure Go
CVE-2026-45022 HIGH 7.5 UPGRADE go-git is an extensible git implementation library written in pure Go
CVE-2026-41506 MEDIUM 4.7 UPGRADE go-git is an extensible git implementation library written in pure Go

References

← Back to latest CVEs