CVE-2025-71351 json
picklescan - Remote Code Execution via timeit.timeit() Detection Bypass
published last yr. modified yesterday also EUVD-2025-210292 , GHSA-v7x6-rv5q-mhwc , PYSEC-2026-4135
- cvss
- 7.6
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 46%
- public exploits
- 0
- none known
Summary
picklescan before 0.0.25 fails to detect malicious pickle files that use timeit.timeit() in the __reduce__ method, allowing remote code execution. Attackers can craft pickle files that import dangerous libraries like os and execute arbitrary system commands, which evade picklescan detection and execute when pickle.load() is called.
Patch / fix
- pypi picklescan 0.0.25
- picklescan picklescan 0.0.25
- github.com/mmaitre314/picklescan#40 pull request
- github.com/mmaitre314/picklescan/releases/tag/v0.0.25 release
Is CVE-2025-71351 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 4mo ago
Exploit prediction
0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/mmaitre314/picklescan/security/advisories/GHSA-v7x6-rv5q-mhwc referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.6 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 7.6 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | picklescan | <0.0.25 |
0.0.25 |
Affected products
- picklescan picklescan
Classification
- Weakness
-
- CWE-184 Incomplete List of Disallowed Inputs
References
-
github.com
/mmaitre314/picklescan/pull/40
web
-
github.com
/mmaitre314/picklescan/security/advisories/GHSA-v7x6-rv5q-mhwc
vendor-advisory, exploit, web
-
vulncheck.com
/advisories/picklescan-remote-code-execution-via-timeit-timeit-detection-bypass
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2025-71351
advisory
-
github.com
/mmaitre314/picklescan
package
-
github.com
/mmaitre314/picklescan/releases/tag/v0.0.25
web
-
pypi.org
/project/picklescan
package
-
github.com
/advisories/GHSA-v7x6-rv5q-mhwc
advisory
Sources
- CVE List CVE-2025-71351
- GitHub Advisory GHSA-v7x6-rv5q-mhwc
- NVD CVE-2025-71351
- OSV PYSEC-2026-4135
Fencer Intel 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.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.