Incorrect Implementation of Authentication Algorithm Affecting libcurl package, versions <0:8.21.0-5.amzn2023.0.2


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.37% (29th percentile)

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  • Snyk IDSNYK-AMZN2023-LIBCURL-20246602
  • published29 Sept 2026
  • disclosed6 Sept 2026

Introduced: 6 Sep 2026

CVE-2026-80230  (opens in a new tab)
CWE-303  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 libcurl to version 0:8.21.0-5.amzn2023.0.2 or higher.
This issue was patched in ALAS2023-2026-3128.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl package and not the libcurl package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

When CURLOPT_PINNEDPUBLICKEY is configured alongside options that disable standard peer verification (CURLOPT_SSL_VERIFYPEER = 0 and CURLOPT_SSL_VERIFYHOST = 0), libcurl fails to enforce public key pinning on connections established without a presented server certificate. Bypassing the pinning check under these disabled-verification conditions allows unauthenticated connections to succeed when they should be rejected.

CVSS Base Scores

version 3.1