PT-2026-23046 · Unknown · Cpp-Httplib

Thesmartshadow · CVE-2026-28435 · Published 2026-03-04 · Updated 2026-03-26

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions cpp-httplib versions prior to 0.35.0

Description cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Before version 0.35.0, the library does not enforce the payload size limit configured via Server::set payload max length() on decompressed request bodies when using HandlerWithContentReader with Content-Encoding: gzip or other supported encodings. A small compressed payload can expand beyond the configured limit, potentially leading to a denial of service through CPU or memory exhaustion.

Recommendations Update to version 0.35.0 or later.

Exploit

Fix

DoS

Resource Exhaustion

Weakness Enumeration

CWE-409

CWE-400

Related Identifiers

CVE-2026-28435

GHSA-XVFX-W463-6FPP

OESA-2026-1552

OESA-2026-1553

OESA-2026-1554

OESA-2026-1555

OPENSUSE-SU-2026:10435-1

OPENSUSE-SU-2026:20733-1

SUSE-SU-2026:21599-1

Affected Products

Cpp-Httplib

References · 32

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28435.json · Exploit
• https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-xvfx-w463-6fpp · Vendor Advisory
• https://github.com/yhirose/cpp-httplib/commit/c99d7472b5cf4869d3897b9afc9792063a3d15a8 · Patch
• https://ubuntu.com/security/CVE-2026-28435 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-28435 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10435-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-28435 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1553 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1552 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-28435 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1555 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-28435 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-28434 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-29076 · Security Note
• https://osv.dev/vulnerability/OESA-2026-1554 · Vendor Advisory