CVE-2026-8258

MEDIUM 5.3

Squirrel sqstdstring.cpp validate_format stack-based overflow

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

A flaw has been found in Squirrel up to 3.2. Impacted is the function validate_format in the library sqstdlib/sqstdstring.cpp. Executing a manipulation can lead to stack-based buffer overflow. The attack can only be executed locally. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

CWE	CWE-121 CWE-119
Vendor	n/a
Product	squirrel
Published	May 11, 2026
Last Updated	May 11, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

n/a / Squirrel

3.0 3.1 3.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/362555 vuldb.com: https://vuldb.com/vuln/362555/cti vuldb.com: https://vuldb.com/submit/809873 github.com: https://github.com/albertodemichelis/squirrel/issues/325 github.com: https://github.com/biniamf/pocs/tree/main/squirrel-validate_format-memcpy-oob

Credits

🔍 biniam (VulDB User) VulDB CNA Team