CVE-2026-2655
ChaiScript chaiscript_defines.hpp operator use after free
Description
A vulnerability was detected in ChaiScript up to 6.1.0. The impacted element is the function chaiscript::str_less::operator of the file include/chaiscript/chaiscript_defines.hpp. The manipulation results in use after free. The attack requires a local approach. The attack requires a high level of complexity. The exploitability is regarded as difficult. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
INFO
Published Date :
Feb. 18, 2026, 2:16 p.m.
Last Modified :
Feb. 19, 2026, 5:22 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | LOW | [email protected] | ||||
| CVSS 3.1 | LOW | [email protected] | ||||
| CVSS 4.0 | LOW | [email protected] |
Solution
- Update ChaiScript to a patched version.
- Review and sanitize string comparisons.
- Avoid using freed memory pointers.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-2655.
| URL | Resource |
|---|---|
| https://github.com/ChaiScript/ChaiScript/ | Product |
| https://github.com/ChaiScript/ChaiScript/issues/632 | Vendor Advisory Exploit Issue Tracking |
| https://github.com/ChaiScript/ChaiScript/issues/632#issue-3827824936 | Vendor Advisory Exploit Issue Tracking |
| https://vuldb.com/?ctiid.346453 | Third Party Advisory VDB Entry |
| https://vuldb.com/?id.346453 | Third Party Advisory VDB Entry |
| https://vuldb.com/?submit.752788 | Third Party Advisory VDB Entry |
| https://github.com/ChaiScript/ChaiScript/issues/632 | Vendor Advisory Exploit Issue Tracking |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-2655 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-2655
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-2655 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-2655 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Feb. 19, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:chaiscript:chaiscript:*:*:*:*:*:*:*:* versions up to (including) 6.1.0 Added Reference Type VulDB: https://github.com/ChaiScript/ChaiScript/ Types: Product Added Reference Type CISA-ADP: https://github.com/ChaiScript/ChaiScript/issues/632 Types: Exploit, Issue Tracking, Vendor Advisory Added Reference Type VulDB: https://github.com/ChaiScript/ChaiScript/issues/632 Types: Exploit, Issue Tracking, Vendor Advisory Added Reference Type VulDB: https://github.com/ChaiScript/ChaiScript/issues/632#issue-3827824936 Types: Exploit, Issue Tracking, Vendor Advisory Added Reference Type VulDB: https://vuldb.com/?ctiid.346453 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/?id.346453 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/?submit.752788 Types: Third Party Advisory, VDB Entry -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Feb. 18, 2026
Action Type Old Value New Value Added Reference https://github.com/ChaiScript/ChaiScript/issues/632 -
New CVE Received by [email protected]
Feb. 18, 2026
Action Type Old Value New Value Added Description A vulnerability was detected in ChaiScript up to 6.1.0. The impacted element is the function chaiscript::str_less::operator of the file include/chaiscript/chaiscript_defines.hpp. The manipulation results in use after free. The attack requires a local approach. The attack requires a high level of complexity. The exploitability is regarded as difficult. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet. Added CVSS V4.0 AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L Added CVSS V2 (AV:L/AC:H/Au:S/C:N/I:N/A:P) Added CWE CWE-119 Added CWE CWE-416 Added Reference https://github.com/ChaiScript/ChaiScript/ Added Reference https://github.com/ChaiScript/ChaiScript/issues/632 Added Reference https://github.com/ChaiScript/ChaiScript/issues/632#issue-3827824936 Added Reference https://vuldb.com/?ctiid.346453 Added Reference https://vuldb.com/?id.346453 Added Reference https://vuldb.com/?submit.752788