CVE-2026-22029
Open redirect flaw in React Router/Remix enables unsafe client redirects.
Is CVE-2026-22029 being exploited?
Not confirmed. CVE-2026-22029 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. EPSS currently estimates a 0.88% probability of exploitation in the next 30 days.
How severe is CVE-2026-22029?
CVE-2026-22029 is rated High with a CVSS score of 8.0. 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-2026-22029?
Yes. A fix has been recorded for CVE-2026-22029. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-22029 affect?
CVE-2026-22029 affects @remix-run/router < 1.23.2, react-router 7.0.0–7.11.0, Remix v1/v2 (Framework/Data/RSC modes). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-22029?
Upgrade to @remix-run/router 1.23.2+ and react-router 7.12.0+
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Open redirects from loaders/actions may cause unsafe URLs triggering client-side JavaScript execution.
Patch when possible
- affected>= 7.0.0 and < 7.12.0
- affected< 1.23.2
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.