CVE-2026-59324

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{"bugzilla": {"description": "org.springframework.integration/spring-integration-core: Spring Integration: Information disclosure via cross-message header leakage", "id": "2525232", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2525232"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.2", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N", "status": "draft"}, "cwe": "CWE-821", "details": ["A flaw was found in Spring Integration. When an IntegrationFlow uses `.fluxTransform()` with an asynchronous `fluxFunction` that emits raw payloads, concurrent requests on the same `FluxMessageChannel` subscription can have their reply headers copied from other messages. This information disclosure vulnerability allows an attacker to potentially access sensitive data such as `replyChannel`, `errorChannel`, `correlationId`, or other security-related headers from concurrent requests."], "mitigation": {"lang": "en:us", "value": "Avoid using raw payload emission inside asynchronous fluxTransform() functions on shared FluxMessageChannel subscriptions, or wrap reactive emissions in Message<T> instances to preserve header isolation per request."}, "name": "CVE-2026-59324", "package_state": [{"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Affected", "package_name": "spring-integration-core", "product_name": "Red Hat Fuse 7"}], "public_date": "2026-08-27T18:04:51Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-59324\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-59324\nhttps://spring.io/security/cve-2026-59324"], "statement": "A concurrency-related context leakage vulnerability exists in Spring Integration's reactive fluxTransform() function when processing raw payloads on a shared FluxMessageChannel. Under concurrent request loads, the transformer copies message headers\u2014including replyChannel, errorChannel, correlationId, and security or tenant context\u2014from the most recently consumed upstream message rather than maintaining request isolation. Unauthenticated remote attackers sending concurrent requests can intercept sensitive routing headers and cross-tenant security tokens, leading to information disclosure and potential message misrouting across session boundaries.", "threat_severity": "Important"}

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