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TI-2026-08383 Aliases CVE-2026-9541GHSA-w3m6-w27h-v4g9

Squirrel Cnut File sqobject.cpp ReadObject heap-based overflow

Priority MEDIUM 55CWE-119Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0017 6th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD and the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Squirrel3.0; 3.1; 3.2—No fix listedCNA
  • Squirrel Vendor— Affected 3.0; 3.1; 3.2 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:squirrel-lang:squirrel:*:*:*:*:*:*:*:*up to 3.2VulnerableSquirrel-lang
  • cpe:2.3:a:squirrel-lang:squirrel:*:*:*:*:*:*:*:* Versions up to 3.2 Vulnerable ·Squirrel-lang

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-9541
  2. 2026-10-03 Alias added: GHSA-w3m6-w27h-v4g9

References

Exploit 2

  • TI-2021-18293 sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read… CVSS 3.1CRITICAL 10.0
  • TI-2026-02925 Squirrel sqstdrex.cpp sqstd_rex_newnode null pointer dereference CVSS 4.0MEDIUM 4.8
  • TI-2026-02924 Squirrel sqcompiler.cpp UnaryOP recursion CVSS 4.0MEDIUM 4.8
  • TI-2026-02273 Squirrel sqobject.h operator heap-based overflow CVSS 4.0MEDIUM 4.8
  • TI-2026-02271 Squirrel sqfuncstate.cpp PopTarget out-of-bounds CVSS 4.0MEDIUM 4.8
  • TI-2022-12528 Heap-based buffer overflow in sqbaselib.cpp in SQUIRREL 3.2 due to lack of a certain sq_reservestack call. CVSS 3.1CRITICAL 10.0

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences