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Description

picklescan before 0.0.28 fails to detect malicious torch.fx.experimental.symbolic_shapes.ShapeEnv.evaluate_guards_expression function calls in pickle files. Attackers can embed undetected code in pickle files that executes remote code when loaded by victims.

PUBLISHED Reserved 2026-06-20 | Published 2026-07-04 | Updated 2026-07-06 | Assigner VulnCheck




HIGH: 7.6CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
HIGH: 8.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Problem types

Deserialization of Untrusted Data

Product status

Default status
unaffected

Any version before 0.0.28
affected

0.0.28 (semver)
unaffected

Credits

FredericDT reporter

References

github.com/...lescan/security/advisories/GHSA-f4x7-rfwp-v3xw exploit

github.com/...lescan/security/advisories/GHSA-f4x7-rfwp-v3xw (GitHub Security Advisory (GHSA-f4x7-rfwp-v3xw)) vendor-advisory

www.vulncheck.com/...pes-shapeenv-evaluate-guards-expression (VulnCheck Advisory: picklescan - Arbitrary Code Execution via torch.fx.experimental.symbolic_shapes.ShapeEnv.evaluate_guards_expression) third-party-advisory

cve.org (CVE-2025-71356)

nvd.nist.gov (CVE-2025-71356)

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