What’s Vulnerable › Vulnerabilities

CVE-2026-40319: Giskard has a Regular Expression Denial of Service (ReDoS) in RegexMatching Check

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-17 · updated 2026-10-25
• Weakness: CWE-1333

Description

Giskard is an open-source testing framework for AI models. In versions prior to 1.0.2b1, the RegexMatching check passes a user-supplied regular expression pattern directly to Python's re.search() without any timeout or complexity guard. A crafted regex pattern can trigger catastrophic backtracking, causing the process to hang indefinitely. Exploitation requires write access to a check definition and subsequent execution of the test suite. This issue has been fixed in giskard-checks version 1.0.2b1.

Affected products

• Giskard-AI giskard-oss: before 1.0.2 — fixed in 1.0.2

How to fix

Upgrade to a fixed version: Giskard-AI giskard-oss 1.0.2. Check the vendor advisory for mitigations.

References

• https://github.com/Giskard-AI/giskard-oss/releases/tag/giskard-checks%2Fv1.0.2b1
• https://github.com/Giskard-AI/giskard-oss/security/advisories/GHSA-rq2q-4r55-9877

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