React Router has Path Traversal in File Session Storage
Exploitation and risk
Source statusCISA KEV lists vulnerabilities known to be exploited. FIRST EPSS estimates the likelihood of exploitation in the next 30 days. An unavailable score does not mean zero risk.
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No exploitation or prediction data is available here for these CVEs. This does not mean they are safe or unlikely to be exploited.
cve-program · CVE-2025-61686
PublishedReact Router is a router for React. In @react-router/node versions 7.0.0 through 7.9.3, @remix-run/deno prior to version 2.17.2, and @remix-run/node prior to version 2.17.2, if createFileSessionStorage() is being used from @react-router/node (or @remix-run/node/@remix-run/deno in Remix v2) with an unsigned cookie, it is possible for an attacker to cause the session to try to read/write from a location outside the specified session file directory. The success of the attack would depend on the permissions of the web server process to access those files. Read files cannot be returned directly to the attacker. Session file reads would only succeed if the file matched the expected session file format. If the file matched the session file format, the data would be populated into the server side session but not directly returned to the attacker unless the application logic returned specific session information. This issue has been patched in @react-router/node version 7.9.4, @remix-run/deno version 2.17.2, and @remix-run/node version 2.17.2.
- Source published
- 10 Jan 2026 02:41:22 UTC
- Source modified
- 15 Jul 2026 01:25:34 UTC
- Saved here
- 23 Oct 2026 15:48:27 UTC
- Source terms
- CVE Program Terms of Use
Original source record · Cite this exact observation · Complete original publisher JSON
Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 3.1 · 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
euvd · EUVD-2026-1468
PublishedReact Router is a router for React. In @react-router/node versions 7.0.0 through 7.9.3, @remix-run/deno prior to version 2.17.2, and @remix-run/node prior to version 2.17.2, if createFileSessionStorage() is being used from @react-router/node (or @remix-run/node/@remix-run/deno in Remix v2) with an unsigned cookie, it is possible for an attacker to cause the session to try to read/write from a location outside the specified session file directory. The success of the attack would depend on the permissions of the web server process to access those files. Read files cannot be returned directly to the attacker. Session file reads would only succeed if the file matched the expected session file format. If the file matched the session file format, the data would be populated into the server side session but not directly returned to the attacker unless the application logic returned specific session information. This issue has been patched in @react-router/node version 7.9.4, @remix-run/deno version 2.17.2, and @remix-run/node version 2.17.2.
Additional publisher context
EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.
Original publisher date fields
datePublished: Jan 10, 2026, 2:41:22 AM
dateUpdated: Jul 15, 2026, 1:25:34 AM
2 related source bulletins · separate from aliases
SUSE-SU-2026:4585-1: Security update 5.2.1 for Multi-Linux Manager Client Tools
CVE-2023-45289 · CVE-2024-22195 · CVE-2025-13836 · CVE-2025-4673 · CVE-2025-61686 · CVE-2026-0864 · CVE-2026-11940 · CVE-2026-11972 · CVE-2026-1229 · CVE-2026-13346 · CVE-2026-14199 · CVE-2026-1502 · CVE-2026-15308 · CVE-2026-1703 · CVE-2026-17033 · CVE-2026-17183 · CVE-2026-19197 · CVE-2026-19475 · CVE-2026-21723 · CVE-2026-2303 · CVE-2026-27459 · CVE-2026-3219 · CVE-2026-3276 · CVE-2026-33814 · CVE-2026-3446 · CVE-2026-3479 · CVE-2026-39821 · CVE-2026-39882 · CVE-2026-40181 · CVE-2026-40475 · CVE-2026-41066 · CVE-2026-41178 · CVE-2026-41606 · CVE-2026-42127 · CVE-2026-42211 · CVE-2026-42342 · CVE-2026-4360 · CVE-2026-44431 · CVE-2026-44990 · CVE-2026-45409 · CVE-2026-4786 · CVE-2026-49825 · CVE-2026-49853 · CVE-2026-49854 · CVE-2026-49855 · CVE-2026-53606 · CVE-2026-56852 · CVE-2026-6019 · CVE-2026-6100 · CVE-2026-6357 · CVE-2026-7210 · CVE-2026-73501 · CVE-2026-7774 · CVE-2026-8328 · CVE-2026-8595 · CVE-2026-8609 · CVE-2026-8643 · CVE-2026-9029
SUSE-SU-2026:4606-1: Security update for golang-github-prometheus-prometheus
CVE-2023-45289 · CVE-2025-4673 · CVE-2025-61686 · CVE-2026-2303 · CVE-2026-39821 · CVE-2026-40181 · CVE-2026-42211 · CVE-2026-42342 · CVE-2026-44990 · CVE-2026-53606 · CVE-2026-56852
- Source published
- Jan 10, 2026, 2:41:22 AM (timezone not stated)
- Source modified
- Jul 15, 2026, 1:25:34 AM (timezone not stated)
- Saved here
- 13 Nov 2026 05:20:30 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
Original source record · Cite this exact observation · Complete original publisher JSON
Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
EUVD CVSS 3.1 · 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
nvd · CVE-2025-61686
PublishedReact Router is a router for React. In @react-router/node versions 7.0.0 through 7.9.3, @remix-run/deno prior to version 2.17.2, and @remix-run/node prior to version 2.17.2, if createFileSessionStorage() is being used from @react-router/node (or @remix-run/node/@remix-run/deno in Remix v2) with an unsigned cookie, it is possible for an attacker to cause the session to try to read/write from a location outside the specified session file directory. The success of the attack would depend on the permissions of the web server process to access those files. Read files cannot be returned directly to the attacker. Session file reads would only succeed if the file matched the expected session file format. If the file matched the session file format, the data would be populated into the server side session but not directly returned to the attacker unless the application logic returned specific session information. This issue has been patched in @react-router/node version 7.9.4, @remix-run/deno version 2.17.2, and @remix-run/node version 2.17.2.
Additional publisher context
NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.
Source analysis status: Modified
Weakness classifications: CWE-22
Original publisher date fields
published: 2026-01-10T03:15:48.283
lastModified: 2026-07-15T02:17:32.150
3 source CPE criteria · context only
- cpe:2.3:a:shopify:react-router\/node:*:*:*:*:*:node.js:*:*
- cpe:2.3:a:shopify:remix-run\/deno:*:*:*:*:*:node.js:*:*
- cpe:2.3:a:shopify:remix-run\/node:*:*:*:*:*:node.js:*:*
The original JSON retains the logical configuration operators, exclusions and version bounds.
- Source published
- 10 Jan 2026 03:15:48 UTC
- Source modified
- 15 Jul 2026 02:17:32 UTC
- Saved here
- 25 Oct 2026 03:17:27 UTC
- Source terms
- NIST NVD usage terms; underlying source attribution retained
Original source record · Cite this exact observation · Complete original publisher JSON
Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 3.1 · [email protected] · Secondary · 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS 3.1 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c · Secondary · 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
osv · GHSA-9583-h5hc-x8cw
PublishedIf applications use `createFileSessionStorage()` from `@react-router/node` (or `@remix-run/node`/`@remix-run/deno` in Remix v2) with an [**unsigned cookie**](https://reactrouter.com/explanation/sessions-and-cookies#signing-cookies), it is possible for an attacker to cause the session to try to read/write from a location outside the specified session file directory. The success of the attack would depend on the permissions of the web server process to access those files. Read files cannot be returned directly to the attacker. Session file reads would only succeed if the file matched the expected session file format. If the file matched the session file format, the data would be populated into the server side session but not directly returned to the attacker unless the application logic returned specific session information.
- Source published
- 8 Jan 2026 20:45:07 UTC
- Source modified
- 18 Sep 2026 21:15:04 UTC
- Saved here
- 24 Oct 2026 13:17:17 UTC
- Source terms
- GitHub Advisory Database · CC-BY-4.0
Original source record · Cite this exact observation · Complete original publisher JSON
Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Publisher rating · CRITICAL