How severe is CVE-2026-9541?

CVE-2026-9541 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-9541 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-9541?

CVE-2026-9541 affects Squirrel-lang Squirrel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-9541?

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

Does CVE-2026-9541 have an EU (EUVD) identifier?

Yes. CVE-2026-9541 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31813.

When was CVE-2026-9541 published?

CVE-2026-9541 was published on 2026-05-26 and last updated on 2026-06-17.

CVE-2026-9541

CVE-2026-9541 is a medium-severity vulnerability in Squirrel-lang Squirrel with a CVSS 3.x base score of 5.3. 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-119.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 4.3
CVSS v4: 1.9
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31813
Weakness: CWE-119
Affected product: Squirrel-lang Squirrel
Published: 2026-05-26
Last modified: 2026-06-17

Description

A security flaw has been discovered in Squirrel up to 3.2. Impacted is the function ReadObject of the file squirrel/sqobject.cpp of the component Cnut File Handler. Performing a manipulation results in heap-based buffer overflow. The attack is only possible with local access. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

Frequently asked questions

What is CVE-2026-9541?: A security flaw has been discovered in Squirrel up to 3.2. Impacted is the function ReadObject of the file squirrel/sqobject.cpp of the component Cnut File Handler. Performing a manipulation results in heap-based buffer overflow. The attack is only possible with local access. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
How severe is CVE-2026-9541?: CVE-2026-9541 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-9541 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-9541?: CVE-2026-9541 affects Squirrel-lang Squirrel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-9541?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-9541 have an EU (EUVD) identifier?: Yes. CVE-2026-9541 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31813.
When was CVE-2026-9541 published?: CVE-2026-9541 was published on 2026-05-26 and last updated on 2026-06-17.

References

Affected products (1)

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

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