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CVE-2026-8258— Squirrel sqstdstring.cpp validate_format stack-based overflow

Quick assessment

Affected
n/a Squirrel
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SQUIRREL是Alberto Demichelis开源的编程语言SQUIRREL 3.2稳定版。 Squirrel 3.2及之前版本存在缓冲区错误漏洞，该漏洞源于库sqstdlib/sqstdstring.cpp中函数validate_format存在栈缓冲区溢出。

CVSS 5.3 · Medium EPSS 0.12% · P3

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 3

VendorProduct Version RangeStatus
n/a Squirrel 3.0 affected
3.1 affected
3.2 affected
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I. Basic Information for CVE-2026-8258

Vulnerability Information
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Vulnerability Title
Squirrel sqstdstring.cpp validate_format stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
SQUIRREL 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SQUIRREL是Alberto Demichelis开源的编程语言SQUIRREL 3.2稳定版。 Squirrel 3.2及之前版本存在缓冲区错误漏洞，该漏洞源于库sqstdlib/sqstdstring.cpp中函数validate_format存在栈缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- Squirrel 3.0 -

II. Public POCs for CVE-2026-8258

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III. Intelligence Information for CVE-2026-8258

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Vendor Advisories for CVE-2026-8258 (2)

Proof of Concept for CVE-2026-8258 (2)

Same Patch Batch · n/a · 2026-05-11 · 48 CVEs total

CVE-2026-8305 7.3 HIGH OpenClaw bluebubbles Webhook monitor.ts handleBlueBubblesWebhookRequest improper authentic
CVE-2026-8261 5.9 MEDIUM Squirrel sqobject.cpp Load heap-based overflow
CVE-2026-8288 4.3 MEDIUM Open5GS SMF gsm-handler.c denial of service
CVE-2026-8291 4.3 MEDIUM Open5GS NRF nnrf-handler.c ogs_nnrf_nfm_handle_nf_profile denial of service
CVE-2026-8290 4.3 MEDIUM Open5GS SMF nsmf-handler.c smf_nsmf_handle_update_data_in_vsmf denial of service
CVE-2026-8289 4.3 MEDIUM Open5GS SMF nsmf-handler.c smf_nsmf_handle_update_data_in_vsmf denial of service
CVE-2026-8292 4.3 MEDIUM Open5GS NRF conv.c yuarel_parse denial of service
CVE-2026-8270 4.3 MEDIUM Open5GS SMF ogs_nas_parse_qos_rules denial of service
CVE-2026-8269 4.3 MEDIUM Open5GS SMF smf_nsmf_handle_create_sm_context denial of service
CVE-2026-8268 4.3 MEDIUM Open5GS SMF OpenAPI_list_create denial of service
CVE-2026-8267 4.3 MEDIUM Open5GS SMF smf_nsmf_handle_created_data_in_vsmf denial of service
CVE-2026-8266 4.3 MEDIUM Open5GS SMF gsm-build.c gsm_build_pdu_session_establishment_accept denial of service
CVE-2026-8276 3.7 LOW bettercap MySQL Server mysql_server.go integer coercion
CVE-2026-8275 3.7 LOW bettercap zerogod IPP Service zerogod_ipp_primitives.go ippReadChunkedBody integer coercio
CVE-2025-61313 docuForm FSM Server 跨站脚本漏洞
CVE-2025-61307 docuForm FSM Server 跨站脚本漏洞
CVE-2025-61305 docuForm FSM Server 跨站脚本漏洞
CVE-2025-61309 docuForm FSM Server 跨站脚本漏洞
CVE-2025-65415 docuForm FSM Server 授权问题漏洞
CVE-2026-31252 CosyVoice 安全漏洞

Showing top 20 of 48 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Squirrel
Same vendor: n/a
Same weakness: CWE-121

V. Comments for CVE-2026-8258

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