PT-2026-65544 · Generalsandman · Tinyweb

Theodosis Paidakis · CVE-2026-67184 · Published 2026-07-28 · Updated 2026-07-28

Mitre

CVSS v3.1

7.5

High

Base vector

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

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.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-67184

Affected Products

Tinyweb

References · 3

• 🔥 https://github.com/theopaid/Unauthenticated-NULL-Pointer-Dereference-Crashes-the-Server-TinyWeb- · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-67184 · Security Note
• https://vulncheck.com/advisories/tinyweb-null-pointer-dereference-dos-via-malformed-http-request · Note