Bug 2483476 (CVE-2026-45372) - CVE-2026-45372 cpp-httplib: cpp-httplib: Arbitrary code execution via improper HTTP header processing
Summary: CVE-2026-45372 cpp-httplib: cpp-httplib: Arbitrary code execution via imprope...
Keywords:
Status: NEW
Alias: CVE-2026-45372
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On: 2483732 2483733
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-29 21:02 UTC by OSIDB Bzimport
Modified: 2026-06-09 08:57 UTC (History)
0 users

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Description OSIDB Bzimport 2026-05-29 21:02:05 UTC 
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.44.0, when cpp-httplib's server parses an incoming request, it applies percent-decoding to every header value except Location and Referer. The validity check (is_field_value) is run before decoding, so encoded %0D%0A passes the check and is then expanded to a literal \r\n byte pair inside the stored header value. This vulnerability is fixed in 0.44.0.
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