Is CVE-2026-74882 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-74882?

CVE-2026-74882 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-74882

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.