by Kastro
Paper/Archive/CVE-2026-74882

CVE-2026-74882

jahlives openssl_encrypt — openssl_encrypt before 1.4.0 Insecure Default Configuration

EPSS 0.2%CVSS 9.1
critical.is priorityof 100
29
CVSS 9.1 (NVD)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 5.9.059 × 201.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
openssl_encrypt< 1.4.01.4.0CNA

Scores by source

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
VulnCheck (CNA)8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
VulnCheck (CNA)7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

advisorygithub.com/jahlives/openssl_encrypt/security/advisories/GHSA-2592-7m3g-7fq6writeupvulncheck.com/advisories/openssl-encrypt-before-insecure-default-configuration