CVE-2026-40319
LOW
GHSA-rq2q-4r55-9877
CVSS VectorNVD
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
2DescriptionNVD
Summary
The RegexMatching check in the giskard-checks package passes a user-supplied regular expression pattern directly to Python's re.search() without any timeout, complexity guard, or pattern validation. An attacker who can control the regex pattern or the text being matched can craft inputs that trigger catastrophic backtracking in the regex engine, causing the process to hang indefinitely and denying service to all other operations.
giskard-checks is a local developer testing library. Check definitions, including the pattern parameter, are provided in application code or configuration files and executed locally. Exploitation requires write access to a check definition and subsequent execution of the test suite. The absence of a regex timeout could cause availability issues in automated environments such as CI/CD pipelines.
Affected component
text_matching.py, line 457: re.search(pattern, text)
Remediation
Upgrade to giskard-checks >= 1.0.2b1.
Credit
Giskard-AI thanks @dhabaleshwar for identifying the missing timeout on regex evaluation.
AnalysisAI
Denial of service in giskard-checks RegexMatching check via unguarded regex pattern matching allows local attackers with write access to check definitions to trigger catastrophic backtracking in Python's re.search() function, causing process hangs and disrupting CI/CD pipelines or automated test execution.
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External POC / Exploit Code
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