CVE-2026-3388: Squirrel sqcompiler.cpp UnaryOP recursion

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 found in Squirrel up to 3.2. This affects the function SQCompiler::Factor/SQCompiler::UnaryOP of the file squirrel/sqcompiler.cpp. Performing a manipulation results in uncontrolled recursion. The attack needs to be approached locally. The exploit has been made public and could be used. 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/312
https://github.com/oneafter/0122/blob/main/i312/repro
https://vuldb.com/?ctiid.348274
https://vuldb.com/?id.348274
https://vuldb.com/?submit.761314

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