ai nanoid up to 5.1.15 non-secure customAlphabet/nanoid infinite loop

Summaryinfo

A vulnerability classified as problematic has been found in ai nanoid up to 5.1.15. This impacts the function customAlphabet/nanoid of the component non-secure. The manipulation leads to infinite loop. This vulnerability is listed as CVE-2026-67214. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in ai nanoid up to 5.1.15. It has been rated as problematic. This issue affects the function customAlphabet/nanoid of the component non-secure. The manipulation with an unknown input leads to a infinite loop vulnerability. Using CWE to declare the problem leads to CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. Impacted is availability. The summary by CVE is:

nanoid (Nano ID) before 5.1.16 contains an infinite loop in the customAlphabet and nanoid functions of its non-secure module (nanoid/non-secure). When these functions are given a negative size, the loop counter is decremented from a negative value and never reaches its termination condition, spinning indefinitely and hanging the calling thread. An application that passes an unvalidated, attacker-controlled negative size to these functions is exposed to a denial-of-service condition.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-67214 since 07/28/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 5.1.16 eliminates this vulnerability.

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Productinfo

Type

• Artificial Intelligence Software

Vendor

• ai

Name

• nanoid

Version

• 5.1.0
• 5.1.1
• 5.1.2
• 5.1.3
• 5.1.4
• 5.1.5
• 5.1.6
• 5.1.7
• 5.1.8
• 5.1.9
• 5.1.10
• 5.1.11
• 5.1.12
• 5.1.13
• 5.1.14
• 5.1.15

Website

• Product: https://github.com/ai/nanoid/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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