AZL-109953

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Import Source
https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-109953.json
JSON Data
https://api.osv.dev/v1/vulns/AZL-109953
Upstream
  • CVE-2026-87866
Published
2026-10-20T21:17:20Z
Modified
2026-10-27T05:36:16Z
Summary
CVE-2026-87866 affecting package curl 8.11.1-11
Details

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.

References

Affected packages

Azure Linux:3 / curl

Package

Name
curl
Purl
pkg:rpm/azure-linux/curl

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Last Affected
8.11.1-11

Database specific

source
"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-109953.json"