CVE Explorer
CVE-2026-27193
Feathersjs is a framework for creating web APIs and real-time applications with TypeScript or JavaScript. In versions 5.0.39 and below, all HTTP request headers are stored in the session cookie, which is signed but not encrypted, exposing internal proxy/gateway headers to clients. The OAuth service stores the complete headers object in the session, then the session is persisted using cookie-session, which base64-encodes the data. While the cookie is signed to prevent tampering, the contents are
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_v5affectedurn:baitaphish:normalized-source-record:v2:200ec1f4f3faebb4b46a472eb3b62ecf9d68ed7e6364b4f5cb86b6abd6b70a37 · sha256:b363e5b13ab598c9… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:200ec1f4f3faebb4b46a472eb3b62ecf9d68ed7e6364b4f5cb86b6abd6b70a37 · sha256:b363e5b13ab598c9… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-200","description":"CWE-200: Exposure of Sensitive Information to an Unauthorized Actor","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:200ec1f4f3faebb4b46a472eb3b62ecf9d68ed7e6364b4f5cb86b6abd6b70a37 · sha256:b363e5b13ab598c9… · /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_v5referenceurn:baitaphish:normalized-source-record:v2:200ec1f4f3faebb4b46a472eb3b62ecf9d68ed7e6364b4f5cb86b6abd6b70a37 · sha256:b363e5b13ab598c9… · /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_v5referenceurn:baitaphish:normalized-source-record:v2:200ec1f4f3faebb4b46a472eb3b62ecf9d68ed7e6364b4f5cb86b6abd6b70a37 · sha256:b363e5b13ab598c9… · /containers/cna/references/2
{"name":"https://github.com/feathersjs/feathers/security/advisories/GHSA-9m9c-vpv5-9g85","tags":["x_refsource_CONFIRM"],"url":"https://github.com/feathersjs/feathers/security/advisories/GHSA-9m9c-vpv5-9g85"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:200ec1f4f3faebb4b46a472eb3b62ecf9d68ed7e6364b4f5cb86b6abd6b70a37 · sha256:b363e5b13ab598c9… · /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.