Linux · 
Debian · Security advisory · March 30, 2026
Debian · Security advisory · March 30, 2026DEBIAN-CVE-2026-21717: nodejs security update
DEBIAN-CVE-2026-21717, released March 30, 2026, fixes 1 CVE in nodejs. None of them is reported as exploited. Patch Radar priority: High.
High
CVEs closed
1
None rated Critical
Exploited
0
None reported
Highest CVSS
7.5
Base score, 0 to 10
Highest EPSS
0.0027
19th percentile
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| nodejs | Debian 13.5 (trixie) | 20.19.2+dfsg-1+deb13u2 |
| nodejs | Debian 14 | 22.22.2+dfsg+~cs22.19.15-1 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| High | CVE-2026-21717 | 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**. | 7.5 | 0.0027 | None reported |
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