Null Pointer Dereference Vulnerability in TinyWeb by Theopaid
CVE-2026-67184

8.7HIGH

Key Information:

Vendor

Generalsandman

Status
Tinyweb
Vendor
CVE Published:
28 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-67184?

TinyWeb versions up to 0.0.8 are vulnerable due to a null pointer dereference issue that can be exploited by unauthenticated remote attackers. By sending a malformed HTTP request containing an invalid version string, attackers can trigger a failure in the HttpParser::execute() function. This failure prevents the proper allocation of the Url object, resulting in a NULL pointer that is subsequently dereferenced in the buildResponse() function without checking for its validity. The result is a SIGSEGV, which crashes the worker process. Repeated attempts can lead to a complete shutdown of the server, requiring manual intervention to restart. This vulnerability poses a significant risk to operational continuity for affected systems.

Affected Version(s)

TinyWeb e48f15d38d2bebeec9cabcfdde81931b10a1963b

TinyWeb e48f15d38d2bebeec9cabcfdde81931b10a1963b

TinyWeb 0.0.8

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-67184 - Proof of Concept

References

https://github.com/theopaid/Unauthenticated-NULL-Pointer-...
technical-descriptionexploit
https://www.vulncheck.com/advisories/tinyweb-null-pointer...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Theodosis Paidakis
.