PYSEC-2026-3771

vendorUSosv

view advisory published 2026-08-17Licence: CC-BY-4.0

openssl_encrypt versions before 1.4.0 contain a sandbox escape vulnerability in the DangerousPatternVisitor AST analyzer that fails to detect dunder attribute traversal techniques. Attackers can use __class__, __bases__, __subclasses__(), and __globals__ chains to access restricted functions and execute arbitrary system commands from plugin code.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-74896US	—	0.56% (46th)	—	2026-08-17
openssl_encrypt versions before 1.4.0 contain a sandbox escape vulnerability in the DangerousPatternVisitor AST analyzer that fails to detect dunder attribute traversal techniques.…

references

External citations — patches, advisories, analysis.

https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-w7gr-9g4g-33mxADVISORY
https://www.vulncheck.com/advisories/openssl-encrypt-before-sandbox-escape-via-dunder-attribute-traversalADVISORY

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