{"id":"CVE-2026-118489","aliases":[],"cve":{"records":[{"id":"CVE-2026-118489","source":"eclipse","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-28T11:32:56.782Z","published":"2026-11-03T14:55:48.515Z","modified":"2026-11-03T18:09:32.017Z"}],"publishers":[{"name":"eclipse","role":"CNA","organizationId":"e51fbebd-6053-4e49-959f-1b94eeb69a2c","modified":"2026-11-03T14:55:48.515Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-03T18:09:32.017Z"}],"references":[{"url":"https://github.com/vert-x3/vertx-web/security/advisories/GHSA-xh2g-9hw9-mvp3","tags":[],"source":"eclipse"},{"url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/523","tags":[],"source":"eclipse"}],"weaknesses":[{"id":"CWE-200","description":"CWE-200 Exposure of Sensitive Information to an Unauthorized Actor","source":"eclipse"},{"id":"CWE-524","description":"CWE-524 Use of Cache Containing Sensitive Information","source":"eclipse"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-03T18:09:07.920897Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"yes"},{"name":"Technical Impact","value":"partial"}]}]},"title":"CachingWebClient shares user-specific HTTP responses across users via the shared cache tier","titleSource":"eclipse","descriptionSource":"eclipse","description":"In Eclipse Vert.x versions [4.0.0,4.5.35] or [5.0.0,5.2.2], when one `CachingWebClient` is shared across users — the documented pattern of a per-user `WebClientSession` over a shared caching client — a response that is specific to one user but is cacheable and not marked `private`/`no-store` is stored in the client-level shared cache tier and served to other users requesting the same URL. A later user's session, or an anonymous caller through the same client, can receive an earlier user's response. Depending on the response this discloses authenticated content or a session cookie, the latter enabling session fixation or hijacking.","score":7.5,"severity":"high","published":"2026-11-03T14:55:48.515Z","modified":"2026-11-03T18:09:32.017Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Eclipse Foundation","name":"Eclipse Vert.x","platforms":[],"versions":[{"version":"4.0.0","status":"affected","lessThanOrEqual":"4.5.35","versionType":"semver"},{"version":"5.0.0","status":"affected","lessThanOrEqual":"5.2.2","versionType":"semver"}],"defaultStatus":"unaffected","cpes":[],"source":"eclipse","url":"https://www.cve.org/CVERecord?id=CVE-2026-118489"}],"remediation":[],"references":["https://github.com/vert-x3/vertx-web/security/advisories/GHSA-xh2g-9hw9-mvp3","https://gitlab.eclipse.org/security/cve-assignment/-/work_items/523"],"sources":[{"name":"CVE","id":"CVE-2026-118489","modified":"2026-11-03T18:09:32.017Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-118489"}],"assessments":[{"source":"eclipse","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5}],"sourceAffected":[],"observedAt":"2026-11-03T18:20:42.263Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T03:00:33.317Z"},"coverage":[{"source":"NVD","status":"no-result","checkedAt":"2026-11-03T15:10:34.472Z","attemptedAt":"2026-11-03T15:10:34.472Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-03T15:10:33.944Z","attemptedAt":"2026-11-03T15:10:33.944Z"},{"source":"EUVD","status":"refresh-failed","attemptedAt":"2026-11-03T15:10:32.501Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-03T15:10:33.404Z","attemptedAt":"2026-11-03T15:10:33.404Z"}],"evidence":[],"aiSummary":{"text":"Eclipse Vert.x versions 4.0.0 to 4.5.35 and 5.0.0 to 5.2.2 have a caching issue, where user-specific HTTP responses are shared across users via the shared cache tier. This can disclose authenticated content or session cookies. An attacker with access to the shared caching client can receive an earlier user's response.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-03T16:06:15.761Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-118489"}]}}