CVE-2026-53872 json
picklescan - Arbitrary File Read via Unsafe Pickle Deserialization
published 2026-01-08 10 mo ago modified 2026-11-08 20 h ago also EUVD-2026-37738 , GHSA-9726-w42j-3qjr , PYSEC-2026-1787
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 43%
- public exploits
- 0
- none known
Summary
picklescan before 0.0.35 contains an unsafe pickle deserialization vulnerability allowing unauthenticated attackers to read arbitrary server files by chaining io.FileIO and urllib.request.urlopen. Attackers can bypass RCE-focused blocklists to exfiltrate sensitive data like /etc/passwd to external servers.
Patch / fix
- pypi picklescan 0.0.35
- picklescan picklescan 0.0.35
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/mmaitre314/picklescan/security/advisories/GHSA-9726-w42j-3qjr referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/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 |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | picklescan | <0.0.35 |
0.0.35 |
Affected products
- picklescan picklescan
Classification
References
-
github.com
/mmaitre314/picklescan/pull/55
web
-
github.com
/mmaitre314/picklescan/commit/a01c58d5dd7960db557b849817c0ab83ab111ef1
web
-
github.com
/mmaitre314/picklescan/security/advisories/GHSA-9726-w42j-3qjr
vendor-advisory, exploit, web
-
vulncheck.com
/advisories/picklescan-arbitrary-file-read-via-unsafe-pickle-deserialization
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-53872
advisory
-
github.com
/mmaitre314/picklescan
package
-
github.com
/mmaitre314/picklescan/releases/tag/v0.0.35
web
-
pypi.org
/project/picklescan
package
-
github.com
/advisories/GHSA-9726-w42j-3qjr
advisory
Sources
- CVE List CVE-2026-53872
- GitHub Advisory GHSA-9726-w42j-3qjr
- NVD CVE-2026-53872
- OSV PYSEC-2026-1787
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