CVE-2026-67183

HIGH

TinyWeb 0.0.8 Memory Leak DoS via HTTP Request Handling

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-67183. PoCs published by theopaid.

AI-analyzed exploit summary Detailed technical analysis of CVE-2026-67183, a memory leak vulnerability in TinyWeb (v0.0.8) caused by missing destructors for `HttpRequest` and `HttpHeaders` structures, leading to unauthenticated memory exhaustion DoS. The writeup includes root cause analysis, code snippets, and a functional PoC demonstrating memory growth.

Description

TinyWeb through 0.0.8 contains a memory leak vulnerability that allows unauthenticated attackers to exhaust available memory by sending ordinary well-formed HTTP requests. Each request causes HttpParser::execute() to allocate Url objects, HttpHeaders objects, and HttpHeader instances via raw new expressions that are never freed due to missing destructors and unreachable delete calls, causing worker resident memory to grow monotonically by approximately 20 to 28 kB per request until the worker process is killed.

Exploits (1)

github WRITEUP
by theopaid · poc
https://github.com/theopaid/CVE-2026-67183-Unauthenticated-Memory-Leak-Leads-To-Memory-Exhaustion-TinyWeb-

Detailed technical analysis of CVE-2026-67183, a memory leak vulnerability in TinyWeb (v0.0.8) caused by missing destructors for `HttpRequest` and `HttpHeaders` structures, leading to unauthenticated memory exhaustion DoS. The writeup includes root cause analysis, code snippets, and a functional PoC demonstrating memory growth.

Classification
Writeup 99%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: TinyWeb v0.0.8 (commits e48f15d to a381da2)
No auth needed
Prerequisites: Network access to TinyWeb's listening port (default: 9090)
mistral-large-3 · analyzed Jul 29, 2026 Full analysis →

References (2)

Core 2

Scores

CVSS v3 7.5
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-401
Status published
Products (2)
GeneralSandman/TinyWeb 0.0.8
GeneralSandman/TinyWeb e48f15d38d2bebeec9cabcfdde81931b10a1963b - a381da252fe8e873c8aff22703040426cc9b2ae0
Published Jul 28, 2026
Tracked Since Jul 28, 2026