Use After Free Vulnerability in ChaiScript Affecting Multiple Versions
CVE-2026-2656

2LOW

Key Information:

Vendor

ChaiScript

Status
Chaiscript
Vendor
CVE Published:
18 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2656?

A vulnerability in ChaiScript, affecting versions up to 6.1.0, is identified in the function chaiscript::Type_Info::bare_equal, leading to a use after free condition. This flaw requires local access to exploit and poses a significant risk as the exploit has been publicly shared. Attackers may leverage this vulnerability to manipulate memory operations, potentially executing arbitrary code within the ChaiScript environment. Despite being notified of this issue via an issue report, the ChaiScript project has not yet addressed the vulnerability, leaving users at risk.

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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-2026-2656 - Proof of Concept

References

https://vuldb.com/?id.346454
vdb-entrytechnical-description
https://vuldb.com/?ctiid.346454
signaturepermissions-required
https://vuldb.com/?submit.752790
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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