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Information Exposure The advisory has been revoked - it doesn't affect any version of package libcurl-devel  (opens in a new tab)

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EPSS
1.69% (74th percentile)

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  • Snyk IDSNYK-RHEL9-LIBCURLDEVEL-11471564
  • published5 Aug 2025
  • disclosed6 Dec 2023
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Introduced: 6 Dec 2023

CVE-2023-46218  (opens in a new tab)
CWE-201  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:9.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl-devel package and not the libcurl-devel package as distributed by RHEL.

This flaw allows a malicious HTTP server to set "super cookies" in curl that are then passed back to more origins than what is otherwise allowed or possible. This allows a site to set cookies that then would get sent to different and unrelated sites and domains.

It could do this by exploiting a mixed case flaw in curl's function that verifies a given cookie domain against the Public Suffix List (PSL). For example a cookie could be set with domain=co.UK when the URL used a lower case hostname curl.co.uk, even though co.uk is listed as a PSL domain.

References