CVE-2026-87866

When built with wolfSSL, curl can successfully validate a pinned public key hash against a key the TLS peer does not possess. During the TLS handshake, wolfSSL validates the connection, but curl's subsequent re-parsing of the same certificate - tricked by a manipulated validity length field - extracts and matches a different embedded key, incorrectly authorizing the pinned public key.

Referanslar

• https://curl.se/docs/CVE-2026-87866.html
• https://curl.se/docs/CVE-2026-87866.json
• https://hackerone.com/reports/3989514
• https://hackerone.com/reports/3989514