CVE-2026-2659: Squirrel sqfuncstate.cpp PopTarget out-of-bounds

Severity: high (CVSS 7.8 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 vulnerability was determined in Squirrel up to 3.2. Affected by this vulnerability is the function SQFuncState::PopTarget of the file src/squirrel/squirrel/sqfuncstate.cpp. Executing a manipulation of the argument _target_stack can lead to out-of-bounds read. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

Affected products

Squirrel: through 3.2

References

https://github.com/albertodemichelis/squirrel/issues/311
https://github.com/oneafter/0122/blob/main/i311/repro
https://vuldb.com/?ctiid.346457
https://vuldb.com/?id.346457
https://vuldb.com/?submit.753163

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