How severe is CVE-2026-45033?

CVE-2026-45033 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-45033 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-45033?

CVE-2026-45033 affects Github Copilot-cli. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-45033?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-45033 have an EU (EUVD) identifier?

Yes. CVE-2026-45033 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30055.

When was CVE-2026-45033 published?

CVE-2026-45033 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2026-45033

CVE-2026-45033 is a high-severity vulnerability in Github Copilot-cli with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-696.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v4: 8.5
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30055
Weakness: CWE-696
Affected product: Github Copilot-cli
Published: 2026-05-13
Last modified: 2026-06-17

Description

GitHub Copilot CLI brings AI-powered coding assistance directly to your command line. Prior to 1.0.43, a security vulnerability has been identified in GitHub Copilot CLI where a malicious bare git repository nested inside a project directory can achieve arbitrary code execution when the agent performs git operations. By exploiting git's automatic bare repository discovery during directory traversal, an attacker can set core.fsmonitor or other executable config keys to run arbitrary commands without user awareness or approval. The vulnerability arises because git's core.fsmonitor config key (and 15+ similar keys such as core.hookspath, diff.external, merge.tool, etc.) can specify arbitrary shell commands that git will execute as part of normal operations like status, diff, or rev-parse. This vulnerability is fixed in 1.0.43.

Frequently asked questions

What is CVE-2026-45033?: GitHub Copilot CLI brings AI-powered coding assistance directly to your command line. Prior to 1.0.43, a security vulnerability has been identified in GitHub Copilot CLI where a malicious bare git repository nested inside a project directory can achieve arbitrary code execution when the agent performs git operations. By exploiting git's automatic bare repository discovery during directory traversal, an attacker can set core.fsmonitor or other executable config keys to run arbitrary commands without user awareness or approval. The vulnerability arises because git's core.fsmonitor config key (and 15+ similar keys such as core.hookspath, diff.external, merge.tool, etc.) can specify arbitrary shell commands that git will execute as part of normal operations like status, diff, or rev-parse. This vulnerability is fixed in 1.0.43.
How severe is CVE-2026-45033?: CVE-2026-45033 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-45033 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-45033?: CVE-2026-45033 affects Github Copilot-cli. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-45033?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-45033 have an EU (EUVD) identifier?: Yes. CVE-2026-45033 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30055.
When was CVE-2026-45033 published?: CVE-2026-45033 was published on 2026-05-13 and last updated on 2026-06-17.

References

https://github.com/github/copilot-cli/security/advisories/GHSA-9ccr-r5hg-74gf

Affected products (1)

cpe:2.3:a:github:copilot-cli:*:*:*:*:*:*:*:*

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