CVE-2025-61686: Shopify React-router/node path traversal (CVSS 9.1)

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.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityNone

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

Shopify React-router/node≥ 7.0.0 < 7.9.4

Shopify Remix-run/deno< 2.17.2

Shopify Remix-run/node< 2.17.2

Remediation

Fixed in

Shopify React-router/node≥ 7.9.4

Shopify Remix-run/deno≥ 2.17.2

Shopify Remix-run/node≥ 2.17.2

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2025-61686 being actively exploited?

CVE-2025-61686 is not in the CISA KEV catalog. Its EPSS exploit probability is 17.3%.

How severe is CVE-2025-61686?

CVE-2025-61686 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 17.3% probability of exploitation.

Which products are affected by CVE-2025-61686?

Affected products include Shopify React-router/node, Shopify Remix-run/deno, Shopify Remix-run/node.

How do I fix CVE-2025-61686?

Upgrade affected software to a fixed version, for example Shopify React-router/node 7.9.4, Shopify Remix-run/deno 2.17.2, Shopify Remix-run/node 2.17.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-61686 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation works Book a demo