CVE Explorer
CVE-2026-53666
React Router is a router for React. In versions 6.4.0 through 7.17.0, if application code was written in a way that allows attacker-supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for an attacker to trigger unexpected constructor execution on the client, which would in turn trigger an outbound network request. This is only possible with very specific (and unlikely) application-layer code. Note that this does not impact an application if it is
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"react-router","vendor":"remix-run","versions":[{"status":"affected","version":">= 6.4.0, < 7.18.0"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:2893732417c4927f3bb3731c4f04f535fe55fff0294e01750984e15b2622e1cf · sha256:ef52faeac90ac6c5… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:2893732417c4927f3bb3731c4f04f535fe55fff0294e01750984e15b2622e1cf · sha256:ef52faeac90ac6c5… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-470","description":"CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:2893732417c4927f3bb3731c4f04f535fe55fff0294e01750984e15b2622e1cf · sha256:ef52faeac90ac6c5… · /containers/cna/problemTypes/0/descriptions/0
Source references
5 source assertions{"name":"https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180","tags":["x_refsource_MISC"],"url":"https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2893732417c4927f3bb3731c4f04f535fe55fff0294e01750984e15b2622e1cf · sha256:ef52faeac90ac6c5… · /containers/cna/references/3
{"name":"https://github.com/remix-run/react-router/commit/9d22943fd46c8ae4b08236425fa3549e10e9ad1a","tags":["x_refsource_MISC"],"url":"https://github.com/remix-run/react-router/commit/9d22943fd46c8ae4b08236425fa3549e10e9ad1a"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2893732417c4927f3bb3731c4f04f535fe55fff0294e01750984e15b2622e1cf · sha256:ef52faeac90ac6c5… · /containers/cna/references/2
{"name":"https://github.com/remix-run/react-router/pull/15175","tags":["x_refsource_MISC"],"url":"https://github.com/remix-run/react-router/pull/15175"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2893732417c4927f3bb3731c4f04f535fe55fff0294e01750984e15b2622e1cf · sha256:ef52faeac90ac6c5… · /containers/cna/references/1
{"name":"https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0","tags":["x_refsource_MISC"],"url":"https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2893732417c4927f3bb3731c4f04f535fe55fff0294e01750984e15b2622e1cf · sha256:ef52faeac90ac6c5… · /containers/cna/references/4
{"name":"https://github.com/remix-run/react-router/security/advisories/GHSA-337j-9hxr-rhxg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/remix-run/react-router/security/advisories/GHSA-337j-9hxr-rhxg"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2893732417c4927f3bb3731c4f04f535fe55fff0294e01750984e15b2622e1cf · sha256:ef52faeac90ac6c5… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.