EUVD-2026-17182
GHSA-326m-34v3-gv5p
CVSS Vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
4Description
A flaw in V8's string hashing mechanism causes integer-like strings to be hashed to their numeric value, making hash collisions trivially predictable. By crafting a request that causes many such collisions in V8's internal string table, an attacker can significantly degrade performance of the Node.js process. The most common trigger is any endpoint that calls `JSON.parse()` on attacker-controlled input, as JSON parsing automatically internalizes short strings into the affected hash table. This vulnerability affects **20.x, 22.x, 24.x, and 25.x**.
Analysis
Denial of service in Node.js 20.x, 22.x, 24.x, and 25.x via predictable hash collisions in V8's string hashing mechanism allows unauthenticated remote attackers to degrade process performance by crafting requests with specially-crafted JSON payloads that trigger collision cascades in the internal string table. CVSS 5.9 (moderate severity, high attack complexity). …
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Priority Score
Vendor Status
Ubuntu
Priority: Medium| Release | Status | Version |
|---|---|---|
| trusty | needs-triage | - |
| xenial | needs-triage | - |
| bionic | needs-triage | - |
| focal | needs-triage | - |
| jammy | needs-triage | - |
| noble | needs-triage | - |
| questing | needs-triage | - |
| upstream | released | 22.22.2+dfsg+~cs22.19.15-1 |
Debian
| Release | Status | Fixed Version | Urgency |
|---|---|---|---|
| bullseye | vulnerable | 12.22.12~dfsg-1~deb11u4 | - |
| bullseye (security) | vulnerable | 12.22.12~dfsg-1~deb11u7 | - |
| bookworm, bookworm (security) | vulnerable | 18.20.4+dfsg-1~deb12u1 | - |
| trixie | fixed | 20.19.2+dfsg-1+deb13u2 | - |
| trixie (security) | fixed | 20.19.2+dfsg-1+deb13u2 | - |
| forky | vulnerable | 22.22.1+dfsg+~cs22.19.15-1 | - |
| sid | fixed | 22.22.2+dfsg+~cs22.19.15-1 | - |
| (unstable) | fixed | 22.22.2+dfsg+~cs22.19.15-1 | - |
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External POC / Exploit Code
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