CVE-2026-40319 json
Giskard has a Regular Expression Denial of Service (ReDoS) in RegexMatching Check
published 2026-04-14 6 mo ago modified 2026-10-25 14 d ago also GHSA-rq2q-4r55-9877 , PYSEC-2026-2489 , EUVD-2026-23454
- cvss
- 5.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 4%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi giskard-checks 1.0.2b1
- giskard giskard 1.0.2
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 1.0 | 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 |
| CNA | 4.0 | 1.0 | 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 |
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| OSV | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | giskard-checks | <1.0.2b1 |
1.0.2b1 |
Affected products
- Giskard-AI giskard-oss
Classification
- Weakness
-
- CWE-1333 Inefficient Regular Expression Complexity
References
-
github.com
/Giskard-AI/giskard-oss/security/advisories/GHSA-rq2q-4r55-9877
web, vendor-advisory
-
github.com
/Giskard-AI/giskard-oss/releases/tag/giskard-checks%2Fv1.0.2b1
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-40319
advisory
-
github.com
/Giskard-AI/giskard-oss
package
-
pypi.org
/project/giskard-checks
package
-
github.com
/advisories/GHSA-rq2q-4r55-9877
advisory
Sources
- CVE List CVE-2026-40319
- GitHub Advisory GHSA-rq2q-4r55-9877
- NVD CVE-2026-40319
- OSV PYSEC-2026-2489
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.