CVE-2026-76220 gitpython-developers CVE debrief

Who should care

Users of GitPython, especially those using versions before 3.1.58, should be aware of this vulnerability and take steps to mitigate it. This includes updating to the latest version of GitPython and restricting access to sensitive GitPython functionality. GitPython users should prioritize patching to prevent potential command execution attacks. Affected operators, platforms, and security teams should review the vulnerability and take necessary actions to protect their systems.

Technical summary

CVE-2026-76220 is a command execution vulnerability in GitPython before version 3.1.58. The vulnerability exists in the check_unsafe_options guard, which can be bypassed by combining a single-character kwarg with split_single_char_options=False. This allows attackers to supply a crafted kwargs dictionary to guarded methods like clone_from, enabling arbitrary OS command execution at default allow_unsafe_options=False. The vulnerability can be exploited by supplying a crafted kwargs dictionary to guarded methods like clone_from, enabling arbitrary OS command execution.

Defensive priority

GitPython users should prioritize patching to prevent potential command execution attacks.

Recommended defensive actions

• Update GitPython to version 3.1.58 or later
• Restrict access to sensitive GitPython functionality
• Monitor GitPython usage for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE-2026-76220 record indicates a command execution vulnerability in GitPython before version 3.1.58. The vulnerability is related to the check_unsafe_options guard, which can be bypassed by combining a single-character kwarg with split_single_char_options=False. This allows attackers to supply a crafted kwargs dictionary to guarded methods like clone_from, enabling arbitrary OS command execution at default allow_unsafe_options=False. However, detailed information about affected systems and exploitation is limited.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.