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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.

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

github.com/ChaiScript/ChaiScript/issues/632 exploit

vuldb.com/?id.346453 (VDB-346453 | ChaiScript chaiscript_defines.hpp operator use after free) vdb-entry technical-description

vuldb.com/?ctiid.346453 (VDB-346453 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.752788 (Submit #752788 | ChaiScript develop branch Use After Free) third-party-advisory

github.com/ChaiScript/ChaiScript/issues/632 issue-tracking

github.com/ChaiScript/ChaiScript/issues/632 exploit issue-tracking

github.com/ChaiScript/ChaiScript/ product

cve.org (CVE-2026-2655)

nvd.nist.gov (CVE-2026-2655)

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