CVE-2026-67184

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/theopaid/Unauthenticated-NULL-Pointer-Dereference-Crashes-the-Server-TinyWeb-
https://www.vulncheck.com/advisories/tinyweb-null-pointer-dereference-dos-via-malformed-http-request

Configurations

No configuration.

History

28 Jul 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-28 17:17

Updated : 2026-07-30 16:41

NVD link : CVE-2026-67184

Mitre link : CVE-2026-67184

CVE.ORG link : CVE-2026-67184

JSON object : View

Products Affected

No product.

CWE

CWE-476

NULL Pointer Dereference

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