CVE-2026-8261
CVE-2026-8261 is a medium-severity vulnerability with a CVSS 3.x base score of 5.9. 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 5.9)
- CVSS v2: 4.6
- CVSS v4: 2.0
- EPSS exploit prediction: 0% (5th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-29017
- Weakness: CWE-119
- Published:
- Last modified:
Description
A vulnerability was determined in Squirrel up to 3.2. This affects the function SQFunctionProto::Load of the file squirrel/sqobject.cpp. This manipulation causes heap-based buffer overflow. The attack is restricted to local execution. 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.
Frequently asked questions
- What is CVE-2026-8261?
- A vulnerability was determined in Squirrel up to 3.2. This affects the function SQFunctionProto::Load of the file squirrel/sqobject.cpp. This manipulation causes heap-based buffer overflow. The attack is restricted to local execution. 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.
- How severe is CVE-2026-8261?
- CVE-2026-8261 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
- Is CVE-2026-8261 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-8261?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-8261 have an EU (EUVD) identifier?
- Yes. CVE-2026-8261 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29017.
- When was CVE-2026-8261 published?
- CVE-2026-8261 was published on 2026-05-11 and last updated on 2026-06-17.
References
- https://github.com/albertodemichelis/squirrel/issues/326
- https://github.com/biniamf/pocs/tree/main/squirrel-sqobject-functionproto-load-intovf-lineinfos
- https://vuldb.com/submit/809904
- https://vuldb.com/vuln/362558
- https://vuldb.com/vuln/362558/cti
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