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CVE-2026-27191

Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. Versions 5.0.39 and below the redirect query parameter is appended to the base origin without validation, allowing attackers to steal access tokens via URL authority injection. This leads to full account takeover, as the attacker obtains the victim's access token and can impersonate them. The application constructs the final redirect URL by concatenating the base origin with the user-supplie
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ce498d4a7aee60ca71a5ea8a9f1f615914a6d447a552fa62ef544f54f2e8a201
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"feathers","vendor":"feathersjs","versions":[{"status":"affected","version":"< 5.0.40"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:265ebad8224898e004fd6edda4f9ec845f260d4ff1c05ed22244e23ac51573ef · sha256:cf3009bcd29f074f… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7.4,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:265ebad8224898e004fd6edda4f9ec845f260d4ff1c05ed22244e23ac51573ef · sha256:cf3009bcd29f074f… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-601","description":"CWE-601: URL Redirection to Untrusted Site ('Open Redirect')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:265ebad8224898e004fd6edda4f9ec845f260d4ff1c05ed22244e23ac51573ef · sha256:cf3009bcd29f074f… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/feathersjs/feathers/commit/ee19a0ae9bc2ebf23b1fe598a1f7361981b65401","tags":["x_refsource_MISC"],"url":"https://github.com/feathersjs/feathers/commit/ee19a0ae9bc2ebf23b1fe598a1f7361981b65401"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:265ebad8224898e004fd6edda4f9ec845f260d4ff1c05ed22244e23ac51573ef · sha256:cf3009bcd29f074f… · /containers/cna/references/1
{"name":"https://github.com/feathersjs/feathers/releases/tag/v5.0.40","tags":["x_refsource_MISC"],"url":"https://github.com/feathersjs/feathers/releases/tag/v5.0.40"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:265ebad8224898e004fd6edda4f9ec845f260d4ff1c05ed22244e23ac51573ef · sha256:cf3009bcd29f074f… · /containers/cna/references/2
{"name":"https://github.com/feathersjs/feathers/security/advisories/GHSA-ppf9-4ffw-hh4p","tags":["x_refsource_CONFIRM"],"url":"https://github.com/feathersjs/feathers/security/advisories/GHSA-ppf9-4ffw-hh4p"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:265ebad8224898e004fd6edda4f9ec845f260d4ff1c05ed22244e23ac51573ef · sha256:cf3009bcd29f074f… · /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.

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