Description
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.
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:L
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| cpp-httplib | — | — |
References
Similar Threats
- Medium CVE-2026-45352
- Critical CVE-2026-45372
- High CVE-2026-46527
- Medium CVE-2026-34441
- High CVE-2026-33745
Site Security Check
Concerned your site may already be targeted?
BotEraser analyzes incoming traffic patterns and helps identify bot behavior consistent with known exploit attempts.
Check My Site Free →No credit card required · Results in minutes
ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.