CVE-2026-118372: falha de média gravidade em OpenBSD LibreSSL
LibreSSL ocspcheck through 4.4.0 CRLF Injection via AIA OCSP URL Path
Publicada em
Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
13Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 6.3epss 0.1%
LibreSSL ocspcheck through 4.4.0 contains a CRLF injection vulnerability that allows attackers to inject HTTP headers by embedding CR/LF sequences in a certificate's AIA OCSP URI path. Because url2host() copies the path without rejecting control characters and http_open() places it in the POST request line, attackers can inject headers or split OCSP requests sent to the responder host.
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
Produtos afetados
OpenBSD · LibreSSLCVEs relacionadas — OpenBSD LibreSSL
No mesmo produto, das mais perigosas para as menos.
CVE-2026-118374HIGHLibreSSL ocspcheck through 4.4.0 Memory Exhaustion via Unbounded OCSP HTTP ResponseEPSS 0.2%CVE-2026-118371MEDIUMLibreSSL through 4.4.0 CRLF Injection via OCSP_sendreq_new() Request LineEPSS 0.1%CVE-2026-118373MEDIUMLibreSSL ocspcheck through 4.4.0 Cleartext Transmission of OCSP Requests via url2host()EPSS 0.1%
Referências
https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-4.4.0-relnotes.txthttps://github.com/libressl/portablehttps://github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/http.c#L344https://github.com/openbsd/src/blob/17a8e44328ee2505d69723a126a390a526e50370/usr.sbin/ocspcheck/ocspcheck.c#L154https://github.com/openbsd/src/commit/3adb7688a5bcfb675fa6d8b10e242022d620a23dhttps://github.com/openbsd/src/commit/6efdc4cce3fac9fa7208a9452f84de34c5a68e9fhttps://www.vulncheck.com/advisories/libressl-ocspcheck-through-4.4.0-crlf-injection-via-aia-ocsp-url-path