CVE-2023-49568: Maliciously crafted Git server replies can cause DoS on go-git clients

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-01-12 · updated 2026-06-17
Weakness: CWE-20

Description

A denial of service (DoS) vulnerability was discovered in go-git versions prior to v5.11. This vulnerability allows an attacker to perform denial of service attacks by providing specially crafted responses from a Git server which triggers resource exhaustion in go-git clients. Applications using only the in-memory filesystem supported by go-git are not affected by this vulnerability. This is a go-git implementation issue and does not affect the upstream git cli.

Affected products

go-git: from 4.0.0 before 5.11.0 — fixed in 5.11.0

How to fix

Upgrade to a fixed version: go-git 5.11.0. Check the vendor advisory for mitigations.

References

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