How severe is CVE-2026-3388?

CVE-2026-3388 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-3388 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3388?

CVE-2026-3388 affects Squirrel-lang Squirrel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3388?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-3388 have an EU (EUVD) identifier?

Yes. CVE-2026-3388 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9123.

When was CVE-2026-3388 published?

CVE-2026-3388 was published on 2026-03-01 and last updated on 2026-06-17.

CVE-2026-3388

CVE-2026-3388 is a low-severity vulnerability in Squirrel-lang Squirrel with a CVSS 3.x base score of 3.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-404.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
CVSS v2: 1.7
CVSS v4: 1.9
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9123
Weakness: CWE-404
Affected product: Squirrel-lang Squirrel
Published: 2026-03-01
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-3388?: 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.
How severe is CVE-2026-3388?: CVE-2026-3388 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-3388 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3388?: CVE-2026-3388 affects Squirrel-lang Squirrel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3388?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-3388 have an EU (EUVD) identifier?: Yes. CVE-2026-3388 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9123.
When was CVE-2026-3388 published?: CVE-2026-3388 was published on 2026-03-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:squirrel-lang:squirrel:*:*:*:*:*:*:*:*

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