PT-2026-29373 · Unknown · Cpp-Httplib

Thesanjok · Published 2026-03-31 · Updated 2026-04-18 · CVE-2026-34441

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions cpp-httplib versions prior to 0.40.0

Description cpp-httplib is vulnerable to HTTP Request Smuggling. The server's static file handler serves GET responses without consuming the request body. On HTTP/1.1 keep-alive connections, the unread body bytes remain on the TCP stream and are interpreted as the start of a new HTTP request. An attacker can embed an arbitrary HTTP request inside the body of a GET request, which the server processes as a separate request.

Recommendations Update cpp-httplib to version 0.40.0 or later.

Exploit

Fix

HTTP Request/Response Smuggling

Weakness Enumeration

CWE-444

Related Identifiers

CVE-2026-34441

GHSA-JV63-RM9J-6JWC

OESA-2026-1867

OESA-2026-1868

OESA-2026-1869

OESA-2026-1870

OPENSUSE-SU-2026:10573-1

Affected Products

Cpp-Httplib

References · 23

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34441.json · Exploit
• https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-jv63-rm9j-6jwc · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-34441 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1868 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34441 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-34441 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-34441 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10573-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-34441 · Security Note
• https://ubuntu.com/security/CVE-2026-34441 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1869 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1870 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33745 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-34441 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1867 · Vendor Advisory