Vulnerability · Published Mar 1, 2026 · Assigned by VulDB

CVE-2026-3388Squirrel sqcompiler.cpp UnaryOP recursion

Low 3.3

In plain English

A low-severity security flaw in Squirrel. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).

Severity (CVSS 3.1)3.3Low

Exploit odds (30 days)0.2%top 91.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:13	squirrel3	no fix listed	DEBIAN-CVE-2026-3388
Ubuntu:22.04:LTS	squirrel3	no fix listed	UBUNTU-CVE-2026-3388
Ubuntu:25.10	squirrel3	no fix listed	UBUNTU-CVE-2026-3388
Ubuntu:26.04:LTS	squirrel3	no fix listed	UBUNTU-CVE-2026-3388
Ubuntu:26.10	squirrel3	no fix listed	UBUNTU-CVE-2026-3388

Affected products (as reported)

Vendor	Product	Versions
n/a	Squirrel	3.03.13.2

Weakness: CWE-674, CWE-404 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R

References

VDB-348274 | Squirrel sqcompiler.cpp UnaryOP recursion vdb-entry, technical-description
VDB-348274 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #761314 | albertodemichelis squirrel master-branch Uncontrolled Recursion third-party-advisory
https://github.com/albertodemichelis/squirrel/issues/312 issue-tracking
https://github.com/oneafter/0122/blob/main/i312/repro exploit