CVE-2026-2656 | THREATINT

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.

PUBLISHED Reserved 2026-02-18 | Published 2026-02-18 | Updated 2026-02-23 | Assigner VulDB

LOW: 2.0CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

LOW: 2.5CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

LOW: 2.5CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

1.0AV:L/AC:H/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR

Problem types

Use After Free

Memory Corruption

Timeline

2026-02-18:	Advisory disclosed
2026-02-18:	VulDB entry created
2026-02-18:	VulDB entry last update

Credits

Oneafter (VulDB User) reporter

References

vuldb.com/?id.346454 (VDB-346454 | ChaiScript type_info.hpp bare_equal use after free) vdb-entry technical-description

vuldb.com/?ctiid.346454 (VDB-346454 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.752790 (Submit #752790 | ChaiScript develop branch Use After Free) third-party-advisory

github.com/ChaiScript/ChaiScript/issues/636 issue-tracking

github.com/ChaiScript/ChaiScript/issues/636 exploit issue-tracking

github.com/ChaiScript/ChaiScript/ product

cve.org (CVE-2026-2656)

nvd.nist.gov (CVE-2026-2656)

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