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CVE-2026-41907— uuid: Missing buffer bounds check in `v3`/`v5`/`v6` when `buf` is provided

Quick assessment

Affected
uuidjs uuid
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

uuid是UUID JavaScript Module开源的一款支持在JavaScript中生成符合RFC的UUID的软件包。 uuid 14.0.0之前版本存在缓冲区错误漏洞，该漏洞源于v3、v5和v6函数接受外部输出缓冲区但未拒绝越界写入，导致静默部分写入调用者提供的缓冲区。

AI Predicted 5.5 Difficulty: Easy EPSS 0.35% · P29

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-41907

Vulnerability Information
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Vulnerability Title
uuid: Missing buffer bounds check in `v3`/`v5`/`v6` when `buf` is provided
Source: CVE Program / CVE List V5
Vulnerability Description
uuid is for the creation of RFC9562 (formerly RFC4122) UUIDs. Prior to 14.0.0, v3, v5, and v6 accept external output buffers but do not reject out-of-range writes (small buf or large offset). This allows silent partial writes into caller-provided buffers. This vulnerability is fixed in 14.0.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U
Source: CVE Program / CVE List V5
Vulnerability Type
使用越界的指针偏移
Source: CVE Program / CVE List V5
Vulnerability Title
uuid 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
uuid是UUID JavaScript Module开源的一款支持在JavaScript中生成符合RFC的UUID的软件包。 uuid 14.0.0之前版本存在缓冲区错误漏洞，该漏洞源于v3、v5和v6函数接受外部输出缓冲区但未拒绝越界写入，导致静默部分写入调用者提供的缓冲区。
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
uuidjs uuid < 14.0.0 -

II. Public POCs for CVE-2026-41907

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: v3 silently wrote 5 bytes into undersized 5-byte buffer (needs 16) without RangeError. Partial UUID data: [69, 161, 19, 172, 199]
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 1986 chars
GitHub 复现环境（可 clone 直接跑）
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III. Intelligence Information for CVE-2026-41907

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Vendor Advisories for CVE-2026-41907 (1)

IV. Related Vulnerabilities

Same product: uuid
Same vendor: uuidjs
Same weakness: CWE-823