CVE-2026-118664
DoS via quadratic URI-decoding in decode-uri-component <0.5.1
Is CVE-2026-118664 being exploited?
Not confirmed. CVE-2026-118664 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.
How severe is CVE-2026-118664?
CVE-2026-118664 is rated High with a CVSS score of 8.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-118664?
Yes. A fix has been recorded for CVE-2026-118664. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-118664 affect?
CVE-2026-118664 affects decode-uri-component <0.5.1, Node.js applications depending on this package, Web servers processing large request bodies. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-118664?
Upgrade to decode-uri-component v0.5.1, rebuild deps and redeploy.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Crafted percent-encoded input causes quadratic CPU growth and Node.js event-loop blocking, leading to denial of service.
Patch when possible
- affected< 0.5.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.