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Description

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.

PUBLISHED Reserved 2026-05-10 | Published 2026-05-11 | Updated 2026-05-11 | Assigner VulDB




MEDIUM: 4.8CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
MEDIUM: 5.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
MEDIUM: 5.3CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
4.3AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Stack-based Buffer Overflow

Memory Corruption

Timeline

2026-05-10:Advisory disclosed
2026-05-10:VulDB entry created
2026-05-10:VulDB entry last update

Credits

biniam (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/362555 (VDB-362555 | Squirrel sqstdstring.cpp validate_format stack-based overflow) vdb-entry technical-description

vuldb.com/vuln/362555/cti (VDB-362555 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/809873 (Submit #809873 | albertodemichelis squirrel 3.2 Stack-based Buffer Overflow) third-party-advisory

github.com/albertodemichelis/squirrel/issues/325 issue-tracking

github.com/.../tree/main/squirrel-validate_format-memcpy-oob exploit

cve.org (CVE-2026-8258)

nvd.nist.gov (CVE-2026-8258)

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