High [CVE-2026-67214] Denial of Service via negative size input in non-secure module functions
This high-severity Red Hat Linux advisory covers CVE-2026-67214 affecting Red Hat Hardened Images.
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Summary
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. A flaw was found in nanoid (Nano ID), a JavaScript library used for generating unique identifiers.
This vulnerability allows an attacker to cause a Denial of Service (DoS) by providing a negative size input to the customAlphabet or nanoid functions within the library's non-secure module. When a negative size is provided, these functions enter an infinite loop, causing the application to hang indefinitely and disrupting service availability.
Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-839.
Affected Red Hat products: Red Hat Hardened Images. Red Hat fixing advisory: RHSA-2026:48241.
- < 5.1.16
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
- 5.1.16
- grafana13-1-main-13.1.1-0.3.hum1
- RHSA-2026:48241
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation
Upgrade to a fixed release: 5.1.16, grafana13-1-main-13.1.1-0.3.hum1, RHSA-2026:48241. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Discussion(0)
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