PT-2026-20480 · Squirrel · Squirrel

Oneafter · Published 2026-01-01 · Updated 2026-02-18 · CVE-2026-2659

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Squirrel versions up to 3.2

Description A flaw exists in Squirrel that could lead to an out-of-bounds read. The issue is related to the SQFuncState::PopTarget function within the src/squirrel/squirrel/sqfuncstate.cpp file. Manipulation of the target stack argument can trigger the flaw. The issue is exploitable on a local host and has been publicly disclosed. The project was notified but has not yet responded.

Recommendations Versions prior to 3.2 should be updated. As a temporary workaround, consider restricting the use of the SQFuncState::PopTarget function until a patch is available.

Exploit

Fix

Buffer Overflow

Out of bounds Read

Weakness Enumeration

CWE-119

CWE-125

Related Identifiers

CVE-2026-2659

Affected Products

Squirrel

References · 14

• 🔥 https://github.com/albertodemichelis/squirrel/issues/311 · Exploit
• 🔥 https://github.com/oneafter/0122/blob/main/i311/repro · Exploit
• https://security-tracker.debian.org/tracker/CVE-2026-2659 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-2659 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-2659 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-2659 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-2659 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-2659 · Security Note
• https://ubuntu.com/security/CVE-2026-2659 · Vendor Advisory
• https://vuldb.com/?ctiid.346457 · Note
• https://twitter.com/CVEnew/status/2024258097804693907 · Twitter Post
• https://vuldb.com/?id.346457 · Note
• https://vuldb.com/?submit.753163 · Note
• https://t.me/CVEtracker/45003 · Telegram Post