How severe is CVE-2026-53669?

No CVSS score has been assigned to CVE-2026-53669 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-53669?

CVE-2026-53669 affects the following packages: react-router (npm). Ecosystems affected: npm.

How do I fix CVE-2026-53669?

Update react-router to 7.18.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-53669 is resolved across your whole dependency graph.

How do I detect CVE-2026-53669 in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for react-router, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-53669 if there is no patch (or I can't update yet)?

Stop reflecting attacker-controlled destinations: resolve every redirect target against an allowlist of paths or hosts you own, prefer a server-side key over a full URL in the request, and reject absolute URLs entirely where the flow only ever needs a relative one.

Is CVE-2026-53669 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-53669 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-53669?

CVE-2026-53669 has an EPSS (Exploit Prediction Scoring System) score of 0.3%, placing it in the 24th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-53669?

CVE-2026-53669 is classified as Open Redirect (CWE-601). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2026-53669 published, and has it been updated?

CVE-2026-53669 was published on July 27, 2026 and was last updated on October 21, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

Not in CISA KEV

CVE-2026-53669 — react-router

Fix: remix-run/react-router#15176

CVE-2026-53669 is a Open Redirect vulnerability in react-router. A fix is available for react-router — see the affected versions and patch details below.

React Router: Open redirect via backslash in <Link> and useNavigate (CVE-2025-68470 bypass)

Also known asGHSA-wrjc-x8rr-h8h6

Published

Jul 27, 2026

Updated

Oct 21, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Oct 23, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-53669.

EPSS Exploitation Probability

via FIRST.org ↗

0.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs24th percentile — riskier than 24% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

9Kother npm packages depend on this — each one inherits the vulnerability until it's patched upstream

react-routernpm

35.6Mdownloads / week

Description

This is a follow up to CVE-2025-68470. React Router was alerted to certain scenarios in which the fix there was incomplete so there still existed some scenarios where attacker supplied paths passed to navigation mechanisms could result in unexpected external navigations.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`react-router`	≥ 6.0.0&&< 7.18.0	7.18.0`npm install react-router@7.18.0`

Affected Products

1 product · 1 configurations

Application

react-routershopify

≥ 6.0.0 && < 7.18.0

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for react-router, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update react-router to 7.18.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-53669 is resolved across your whole dependency graph.
Workarounds
Stop reflecting attacker-controlled destinations: resolve every redirect target against an allowlist of paths or hosts you own, prefer a server-side key over a full URL in the request, and reject absolute URLs entirely where the flow only ever needs a relative one.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

This Moderate impact open redirect vulnerability in React Router affects multiple Red Hat products. A remote attacker could exploit this by crafting a malicious link that uses backslashes in navigation components, leading to user redirection to arbitrary external websites. This could facilitate phishing attacks…

Workaround published by Red Hat

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Source: Red Hat security advisory for CVE-2026-53669 (CC BY 4.0)

Product	Fixed in	Advisory
Red Hat Hardened Images	`prometheus3-13-main-3.13.1-0.5.hum1`	RHSA-2026:48780
Red Hat Hardened Images	`prometheus3-5-main-3.5.5-0.6.hum1`	RHSA-2026:48799

Frequently Asked Questions

This is a follow up to [CVE-2025-68470](https://github.com/remix-run/react-router/security/advisories/GHSA-9jcx-v3wj-wh4m). React Router was alerted to certain scenarios in which the fix there was incomplete so there still existed some scenarios where attacker supplied paths passed to navigation mechanisms could result in unexpected external navigations.

O3 Security · Impact-Aware SCA

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