CVE-2026-3389: Squirrel sqstdrex.cpp sqstd_rex_newnode null pointer dereference

Severity: medium (CVSS 5.5 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: 2026-03-01 · updated 2026-06-17
Weakness: CWE-404

Description

A vulnerability was determined in Squirrel up to 3.2. This vulnerability affects the function sqstd_rex_newnode in the library sqstdlib/sqstdrex.cpp. Executing a manipulation can lead to null pointer dereference. The attack can only be executed locally. 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/314
https://github.com/oneafter/0122/blob/main/i314/repro
https://vuldb.com/?ctiid.348275
https://vuldb.com/?id.348275
https://vuldb.com/?submit.761315

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