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Public proof of conceptFix available

CVE-2025-61686

A public proof of concept exists; no exploitation attested.

  • Published2026-01-10
  • Fixed in7.9.4
  • WeaknessCWE-22

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

React 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.

Timeline

dates in UTC
  1. 2026-01-1003:15CVE publishedNVD

Versions per branch

NVD · OSV
Shopify react-router\/node
BranchAffectedFixed in
7.x≥ 7.0.0, < 7.9.47.9.4
Shopify remix-run\/deno
BranchAffectedFixed in
2.17< 2.17.22.17.2
Shopify remix-run\/node
BranchAffectedFixed in
2.17< 2.17.22.17.2

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • remix-run react-router
    Affected
    • = @react-router/node >= 7.0.0, < 7.9.4no fix stated
    • = @remix-run/deno < 2.17.2no fix stated
    • = @remix-run/node < 2.17.2no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-01-10

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • @remix-run/denoTuxCare:npmfrom 1.19.3-tuxcare.0 · fixed in 1.19.3-tuxcare.4and 3 other packages
  • @remix-run/denoTuxCare:npmfrom 2.17.0-tuxcare.0 · fixed in 2.17.0-tuxcare.1and 3 other packages
  • golang-github-prometheus-prometheusSUSE:Multi Linux Manager Tools SLE-15all versions · fixed in 3.13.2-150002.3.19.1
  • golang-github-prometheus-prometheusSUSE:Linux Enterprise Module for Package Hub 15 SP7all versions · fixed in 3.13.2-150100.4.40.2
  • grafanaSUSE:Multi Linux Manager Tools SLE-15all versions · fixed in 12.4.10-150002.4.27.1
  • mgr-pushSUSE:Multi Linux Manager Tools SLE-15all versions · fixed in 5.2.5-150002.3.12.1
  • react-routerTuxCare:npmfrom 7.5.1-tuxcare.0 · fixed in 7.5.1-tuxcare.5and 11 other packages
  • spacecmdSUSE:Multi Linux Manager Tools SLE-15all versions · fixed in 5.2.10-150002.3.15.1

5 more package ranges on OSV.dev

Vendor advisories

  • CVE-2025-61686 Red Hat Product Security

    react-router: React Router has Path Traversal in File Session Storage

Full record on NVD

Fix

  1. Update Shopify react-router\/node to 7.9.4

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionnone2026-01-12
  • CNACVSS 3.19.1known since 2026-10-23
  • CNAweakness (CWE)CWE-22known since 2026-10-23
  • FIRST EPSSEPSS score17.3 %read 2026-11-09
  • PoC-in-GitHubproof of concept3known since 2026-11-01
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryCRITICAL2026-01-08

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Published
2026-01-10
Last Modified
2026-07-15
NVD status
Modified
GitHub Advisory
GHSA-9583-h5hc-x8cw

Frequently asked questions

What is CVE-2025-61686?

React 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.

Is CVE-2025-61686 actively exploited?

Active exploitation of CVE-2025-61686 has not been confirmed. Its EPSS score was 17.3% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-61686?

CVE-2025-61686 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

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