Use After Free Vulnerability in ChaiScript Up to Version 6.1.0
CVE-2026-2655

2LOW

Key Information:

Vendor

ChaiScript

Status
Chaiscript
Vendor
CVE Published:
18 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2655?

A use after free vulnerability has been identified in ChaiScript versions up to 6.1.0, specifically within the function chaiscript::str_less::operator in the file include/chaiscript/chaiscript_defines.hpp. This vulnerability allows for potential exploitation through local manipulation, requiring a certain level of skill to execute. The vulnerability has been made public and the project maintainers were notified of this issue through an issue report, although no public response has been provided yet.

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Affected Version(s)

ChaiScript 6.0

ChaiScript 6.1.0

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-2026-2655 - Proof of Concept

References

https://vuldb.com/?id.346453
vdb-entrytechnical-description
https://vuldb.com/?ctiid.346453
signaturepermissions-required
https://vuldb.com/?submit.752788
third-party-advisory

CVSS V4

Score:
2
Severity:
LOW
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Oneafter (VulDB User)
JSON
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