Is CVE-2026-28435 actively exploited?

No active exploitation of CVE-2026-28435 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-28435 be exploited remotely?

Yes. CVE-2026-28435 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-28435?

CVE-2026-28435 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-28435

HIGH

CVE-2026-28435

CWE-400Published: March 4, 2026· Updated: Mar 5, 2026

7.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.9th

Official Description

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.35.0, cpp-httplib (httplib.h) does not enforce Server::set_payload_max_length() on the decompressed request body when using HandlerWithContentReader (streaming ContentReader) with Content-Encoding: gzip (or other supported encodings). A small compressed payload can expand beyond the configured payload limit and be processed by the application, enabling a payload size limit bypass and potential denial of service (CPU/memory exhaustion). This vulnerability is fixed in 0.35.0.

NVD Source

Technical Analysis

CVE-2026-28435 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.