{"id":"CVE-2026-74882","summary":"openssl_encrypt before 1.4.0 Insecure Default Configuration","details":"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.","aliases":["GHSA-2592-7m3g-7fq6","PYSEC-2026-3744"],"modified":"2026-09-02T03:47:19.884089587Z","published":"2026-08-17T11:04:48.426Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-345"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74882.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74882.json"},{"type":"ADVISORY","url":"https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-2592-7m3g-7fq6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74882"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openssl-encrypt-before-insecure-default-configuration"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/jahlives/openssl_encrypt","events":[{"introduced":"0"},{"fixed":"768df5cd1910e349509f07a27eeac6951e0003bf"}],"database_specific":{"source":["AFFECTED_FIELD","CPE_RANGE"],"cpe":"cpe:2.3:a:jahlives:openssl_encrypt:*:*:*:*:*:python:*:*","extracted_events":[{"introduced":"0"},{"fixed":"1.4.0"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74882.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}