PT-2026-44988 · Unknown+2 · Cpp-Httplib+2

Jjjsmz · CVE-2026-45372 · Published 2026-05-13 · Updated 2026-06-25

Positive Technologies (AI Summary)

CVSS v3.1

9.9

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:L

Name of the Vulnerable Software and Affected Versions cpp-httplib versions prior to 0.44.0

Description When the server parses an incoming request, it applies percent-decoding to every header value except Location and Referer. Because the validity check is field value() is performed before decoding, encoded %0D%0A sequences pass the check and are subsequently expanded into literal r byte pairs within the stored header value.

Recommendations Update to version 0.44.0.

Exploit

Fix

HTTP Request/Response Smuggling

Weakness Enumeration

CWE-444

CWE-93

Related Identifiers

BDU:2026-07650

CVE-2026-45372

GHSA-XJXG-64P4-VJ4M

OPENSUSE-SU-2026:10994-1

USN-8470-1

Affected Products

Linuxmint

Ubuntu

Cpp-Httplib

References · 20

• 🔥 https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-xjxg-64p4-vj4m · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45372.json · Exploit
• https://osv.dev/vulnerability/CVE-2026-45372 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8470-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-45372 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8470-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-45372 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-45372 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45372 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10994-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-45372 · Security Note
• https://bdu.fstec.ru/vul/2026-07650 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-45372 · Vendor Advisory
• https://github.com/yhirose/cpp-httplib/commit/fbb031ed8504a0e48d9ca63caecc0614c296f755 · Note
• https://suse.com/security/cve/CVE-2026-46527 · Note