---
title: "CVE-2026-8261\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2026-8261?format=md
keywords: index, follow
---

# CVE-2026-8261

Publication date 11 May 2026

Last updated 26 June 2026

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**5.9 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2026-8261?format=md#impact-score)

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## 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.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| squirrel3 | 26.04 LTS resolute | Needs evaluation |
| 25.10 questing | Ignored end of life, was needs-triage |
| 24.04 LTS noble | Not in release |
| 22.04 LTS jammy | Needs evaluation |
| 20.04 LTS focal | Needs evaluation |
| 18.04 LTS bionic | Needs evaluation |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:

CVSS v4.0

[CVSS v4.0](https://ubuntu.com/security/CVE-2026-8261?format=md)
[CVSS v3.0](https://ubuntu.com/security/CVE-2026-8261?format=md)

**Base score**

2.0 · Low

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | Low |
  | Attack requirements | None |
  | Privileges required | None |
  | User interaction | None |
  | Vulnerable system - Confidentiality impact | Low |
  | Vulnerable system - Integrity impact | Low |
  | Vulnerable system - Availability impact | Low |
  | Subsequent system - Confidentiality impact | None |
  | Subsequent system - Integrity impact | None |
  | Subsequent system - Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 2.0 · Low |
  | Base + Threat score | - |
  | Base + Environmental score | - |
  | Base + Threat + Environmental score | - |

**Vector:** CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-8261)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-8261)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-8261)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-8261)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-8261>
* <https://github.com/albertodemichelis/squirrel/issues/326>