PT-2026-20416 · Unknown · Chaiscript

Oneafter · Published 2026-02-18 · Updated 2026-02-19 · CVE-2026-2655

Positive Technologies (AI Summary)

CVSS v3.1

2.5

Low

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions ChaiScript versions up to 6.1.0

Description A flaw exists in ChaiScript that involves a use-after-free condition. This issue is related to the chaiscript::str less::operator function within the include/chaiscript/chaiscript defines.hpp file. Exploitation requires local access and is considered difficult. The exploit is publicly available. The project was notified of the issue but has not yet responded.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Use After Free

Weakness Enumeration

CWE-119

CWE-416

Related Identifiers

CVE-2026-2655

Affected Products

Chaiscript

References · 11

• 🔥 https://github.com/ChaiScript/ChaiScript/issues/632 · Exploit
• 🔥 https://github.com/ChaiScript/ChaiScript/issues/632#issue-3827824936 · Exploit
• https://osv.dev/vulnerability/CVE-2026-2655 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-2655 · Security Note
• https://github.com/ChaiScript/ChaiScript · Note
• https://t.me/cveNotify/152339 · Telegram Post
• https://vuldb.com/?ctiid.346453 · Note
• https://twitter.com/CVEnew/status/2024138079473426755 · Twitter Post
• https://t.me/cveNotify/152479 · Telegram Post
• https://vuldb.com/?submit.752788 · Note
• https://vuldb.com/?id.346453 · Note