CVE-2026-104150
Regex backtracking in AdonisJS router allows CPU DoS via crafted route slug.
Is CVE-2026-104150 being exploited?
Not confirmed. CVE-2026-104150 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-2026-104150?
CVE-2026-104150 is rated High with a CVSS score of 8.7. 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-2026-104150?
Yes. A fix has been recorded for CVE-2026-104150. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-104150 affect?
CVE-2026-104150 affects AdonisJS HTTP Server (versions prior to 8.2.2), AdonisJS HTTP Server (versions prior to 9.1.1), Applications using router.matchers.slug(). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-104150?
Upgrade to v8.2.2 or v9.1.1 and apply WAF/ingress rules to block malicious slugs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote CPU exhaustion (regex DoS) via attacker-controlled route slug; can block Node.js event loop, stop workers and health checks.
Immediate action required
- affected< 8.2.2
- affected>= 9.0.0 and < 9.1.1
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.