How severe is CVE-2026-40319?

CVE-2026-40319 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-40319 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40319?

CVE-2026-40319 affects Giskard. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40319?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-40319 have an EU (EUVD) identifier?

Yes. CVE-2026-40319 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23454.

When was CVE-2026-40319 published?

CVE-2026-40319 was published on 2026-04-17 and last updated on 2026-06-17.

CVE-2026-40319

CVE-2026-40319 is a medium-severity vulnerability in Giskard with a CVSS 3.x base score of 5.5. 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-1333.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v4: 1.0
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23454
Weakness: CWE-1333
Affected product: Giskard
Published: 2026-04-17
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-40319?: 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.
How severe is CVE-2026-40319?: CVE-2026-40319 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-40319 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40319?: CVE-2026-40319 affects Giskard. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40319?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40319 have an EU (EUVD) identifier?: Yes. CVE-2026-40319 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23454.
When was CVE-2026-40319 published?: CVE-2026-40319 was published on 2026-04-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:giskard:giskard:*:*:*:*:*:*:*:*

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