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CVE-2026-87866Published

wolfSSL public-key pinning bypass

Exact source revision recorded 29 Oct 2026 19:28:49 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-87866

Published

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.

Source published
20 Oct 2026 20:16:30 UTC
Source modified
29 Oct 2026 18:59:00 UTC
Observed here
29 Oct 2026 19:28:49 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

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Sources read 7 Nov 05:48 UTC · 275 of 275 readable · 274 fully read · documentation 469/469 current

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