CVE-2026-40319: Giskard is an open-source testing framework for AI models

Q: How do I fix CVE-2026-40319?

giskard: upgrade to 1.0.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-40319 being exploited?

CVE-2026-40319 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-40319 affect?

CVE-2026-40319 affects giskard. Severity is medium (CVSS 5.5). 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 c

Q: How urgent is CVE-2026-40319?

Priority 20/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADE

CVE-2026-40319 is a medium-severity flaw (CVSS 5.5) affecting giskard. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 is

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-1333
Published	2026-04-17
Last modified	2026-10-25

Publisher (CNA): GitHub, Inc. · Vendor: giskard

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-17 18:16 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

giskard giskard UPGRADE

Affected: < 1.0.2

Fixed in: 1.0.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy giskard || rpm -q giskard || giskard --version

2. UPGRADE to 1.0.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade giskard

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade giskard

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-40319?

giskard: upgrade to 1.0.2. Exact commands for each OS are on this page.

Is CVE-2026-40319 being exploited?

CVE-2026-40319 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-40319 affect?

CVE-2026-40319 affects giskard. Severity is medium (CVSS 5.5). 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 c

How urgent is CVE-2026-40319?

Priority 20/100. No elevated risk signals yet.

Software pages

Python vulnerabilities

References

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