CVE-2025-1944 json
picklescan ZIP archive manipulation attack leads to crash
published last yr. modified 4mo ago also GHSA-7q5r-7gvp-wc82 , PYSEC-2025-20 , EUVD-2025-7156
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 26%
- public exploits
- 0
- none known
Summary
picklescan before 0.0.23 is vulnerable to a ZIP archive manipulation attack that causes it to crash when attempting to extract and scan PyTorch model archives. By modifying the filename in the ZIP header while keeping the original filename in the directory listing, an attacker can make PickleScan raise a BadZipFile error. However, PyTorch's more forgiving ZIP implementation still allows the model to be loaded, enabling malicious payloads to bypass detection.
Patch / fix
Is CVE-2025-1944 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
- yes
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-11).
Exploits and checks
- github.com https://github.com/mmaitre314/picklescan/security/advisories/GHSA-7q5r-7gvp-wc82 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L |
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/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 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
| OSV | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | picklescan | <0.0.23 |
0.0.23 |
Affected products
- mmaitre314 picklescan
Classification
- Weakness
-
- CWE-345 Insufficient Verification of Data Authenticity
References
-
github.com
/mmaitre314/picklescan/commit/e58e45e0d9e091159c1554f9b04828bbb40b9781
patch, web
-
github.com
/mmaitre314/picklescan/security/advisories/GHSA-7q5r-7gvp-wc82
vendor-advisory, web, exploit, evidence
-
sonatype.com
/security-advisories/cve-2025-1944
third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-1944
advisory
-
github.com
/mmaitre314/picklescan
package
-
github.com
/pypa/advisory-database/tree/main/vulns/picklescan/PYSEC-2025-20.yaml
web
-
sites.google.com
/sonatype.com/vulnerabilities/cve-2025-1944
web
Sources
- CVE List CVE-2025-1944
- GitHub Advisory GHSA-7q5r-7gvp-wc82
- NVD CVE-2025-1944
- OSV PYSEC-2025-20
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.