Vulnerability · Published Jul 28, 2026 · Assigned by VulnCheck

CVE-2026-67184TinyWeb 0.0.8 Null Pointer Dereference DoS via Malformed HTTP Request

High 7.5

In plain English

A high-severity null pointer dereference in TinyWeb from GeneralSandman. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.6%top 50.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack tooling1Public PoC

Official description

TinyWeb through 0.0.8 contains a null pointer dereference vulnerability that allows unauthenticated remote attackers to crash worker processes by sending a malformed HTTP request line with an invalid version string. The HttpParser::execute() function fails to allocate the Url object when version parsing fails, leaving the url pointer NULL, and buildResponse() subsequently dereferences this NULL pointer without checking the valid_requ flag, producing a SIGSEGV that terminates the worker process and, when repeated across all workers, takes the server permanently offline until manually restarted.

Affected products (as reported)

Vendor	Product	Versions
GeneralSandman	TinyWeb	e48f15d38d2bebeec9cabcfdde81931b10a1963b – through a381da252fe8e873c8aff22703040426cc9b2ae00.0.8

Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Researcher Disclosure technical-description, exploit
https://www.vulncheck.com/advisories/tinyweb-null-pointer-dereference-dos-via-malformed-http-request third-party-advisory