CVE Explorer
CVE-2026-15076
In versions up to and including 4.5.29 (4.x branch) and 5.1.4 (5.x branch), the WebClientSession component of Eclipse Vert.x Web Client does not validate that the Domain attribute of a Set-Cookie response header matches the originating server's domain, in violation of RFC 6265 section 5.3.
An attacker who controls any server that the victim application contacts can inject a cookie scoped to an arbitrary third-party domain; because the session store performs no cross-domain ownership check, it st
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Eclipse Vert.x","repo":"https://github.com/vert-x3/vertx-web","vendor":"Eclipse Foundation","versions":[{"lessThanOrEqual":"4.5.29","status":"affected","version":"4.0.0","versionType":"semver"},{"lessThanOrEqual":"5.1.4","status":"affected","version":"5.0.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:80e6d3c939dbe7a654acc7b48dab2f07ff01314f1d0a556a5a29995fe19c86af · sha256:5bb98365993fda0d… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:80e6d3c939dbe7a654acc7b48dab2f07ff01314f1d0a556a5a29995fe19c86af · sha256:5bb98365993fda0d… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-346","description":"CWE-346: Origin Validation Error","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:80e6d3c939dbe7a654acc7b48dab2f07ff01314f1d0a556a5a29995fe19c86af · sha256:5bb98365993fda0d… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/162"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:80e6d3c939dbe7a654acc7b48dab2f07ff01314f1d0a556a5a29995fe19c86af · sha256:5bb98365993fda0d… · /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.