CVE-2026-40319: Giskard

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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 Giskard: before 1.0.2 (fixed in 1.0.2)

Published 2026-04-17. Last modified 2026-06-17.