CVE-2026-74886

openssl_encrypt versions before 1.4.0 contain a plugin sandbox bypass vulnerability where the PluginImportGuard blocks a different set of modules than the AST analyzer's DANGEROUS_MODULES set. Attackers can bypass AST analysis through string obfuscation or encoding to import unblocked dangerous modules like sys, shutil, multiprocessing, importlib, and pickle for arbitrary code execution.

CVSS 4.0

9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-25)

CWE

CWE-184

Published

2026-08-17

Modified

2026-10-24

Record from

the NVD, synced 2026-10-24

Affected

• jahlives:openssl_encrypt

Packages (OSV)

References

• https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-9pgj-v69p-q586
• https://www.vulncheck.com/advisories/openssl-encrypt-before-plugin-import-guard-bypass

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