CVE-2026-2656: ChaiScript type_info.hpp bare_equal use after free

Severity: low (CVSS 2.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-02-18 · updated 2026-06-17
Weakness: CWE-119

Description

A flaw has been found in ChaiScript up to 6.1.0. This affects the function chaiscript::Type_Info::bare_equal of the file include/chaiscript/dispatchkit/type_info.hpp. This manipulation causes use after free. The attack requires local access. The attack's complexity is rated as high. The exploitability is reported as difficult. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Affected products

ChaiScript: through 6.1.0

References

https://github.com/ChaiScript/ChaiScript/
https://github.com/ChaiScript/ChaiScript/issues/636
https://github.com/ChaiScript/ChaiScript/issues/636#issue-3828333582
https://vuldb.com/?ctiid.346454
https://vuldb.com/?id.346454
https://vuldb.com/?submit.752790

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