CVE-2026-74882

PYSEC-2026-3744 · CVE-2026-74882 · GHSA-2592-7m3g-7fq6

Published Aug 17, 2026 · Modified Sep 1, 2026

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Description

openssl_encrypt versions before 1.4.0 contain an insecure default configuration that trusts the entire RFC 1918 private address space in IntegrityProxyConfig trusted_proxies. Attackers on private networks can forge client certificate headers to bypass mTLS authentication when ProxyAuth validation is relaxed or modified.

References

ADVISORY https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-2592-7m3g-7fq6
ADVISORY https://www.vulncheck.com/advisories/openssl-encrypt-before-insecure-default-configuration

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CVE-2026-74882

Description

References

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