Linux · 
Debian · Security advisory · March 30, 2026
Debian · Security advisory · March 30, 2026DEBIAN-CVE-2026-21710: nodejs security update
DEBIAN-CVE-2026-21710, 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
0.2544
97th percentile
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| nodejs | Debian 12.15 (bookworm) | 18.20.4+dfsg-1~deb12u2 |
| 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-2026-21710 | A flaw in Node.js HTTP request handling causes an uncaught `TypeError` when a request is received with a header named `__proto__` and the application accesses `req.headersDistinct`. When this occurs, `dest["__proto__"]` resolves to `Object.prototype` rather than `undefined`, causing `.push()` to be called on a non-array. This exception is thrown synchronously inside a property getter and cannot be intercepted by `error` event listeners, meaning it cannot be handled without wrapping every `req.headersDistinct` access in a `try/catch`. * This vulnerability affects all Node.js HTTP servers on **20.x, 22.x, 24.x, and v25.x** | 7.5 | 0.2544 | None reported |
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