MEDIUMCVSS 4.8
OkHttp through 5.5.1 contains an improper certificate validation vulnerability in CertificatePinner that skips pin checks because Pin.matchesHostname does not normalize trailing-dot hostnames. Network attackers with a CA-trusted certificate not matching configured pins can intercept or modify TLS traffic when applications request the trailing-dot form of pinned hosts.
Published 2026-11-15 · last modified 2026-11-15
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