CVE-2026-118371mediumCWE-93

CVE-2026-118371: medium-severity vulnerability in OpenBSD LibreSSL

LibreSSL through 4.4.0 CRLF Injection via OCSP_sendreq_new() Request Line

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.3epss 0.1%
LibreSSL through 4.4.0 contains a CRLF injection vulnerability in the libcrypto OCSP_sendreq_new() and OCSP_parse_url() functions, which write unvalidated request paths into the OCSP POST request line. Attackers can embed carriage return and line feed characters in a certificate's Authority Information Access OCSP URI to inject HTTP headers or split requests sent to responders and proxies.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Affected products
OpenBSD · LibreSSL
Related CVEs — OpenBSD LibreSSL

In the same product, most dangerous first.

CVE-2026-118374HIGHLibreSSL ocspcheck through 4.4.0 Memory Exhaustion via Unbounded OCSP HTTP ResponseEPSS 0.2%CVE-2026-118372MEDIUMLibreSSL ocspcheck through 4.4.0 CRLF Injection via AIA OCSP URL PathEPSS 0.1%CVE-2026-118373MEDIUMLibreSSL ocspcheck through 4.4.0 Cleartext Transmission of OCSP Requests via url2host()EPSS 0.1%