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CVE-2026-56140 is an improper input validation issue in the Apache Camel camel-aws2-sns component affecting versions 4.0.0 before 4.14.8, 4.15.0 before 4.18.3, and 4.19.0 before 4.21.0. The issue concerns Sns2HeaderFilterStrategy, which originally defined outbound header filtering but lacked a corresponding inbound Camel-namespace filter rule. In related components, such an inbound filtering gap could permit externally supplied message attributes to be mapped into a Camel Exchange as control headers. In camel-aws2-sns, however, the endpoint is producer-only and does not support consumers, so externally supplied SNS message attributes are not mapped inbound through this component. Apache added an inbound Camel-namespace filter rule in CAMEL-23506 to align Sns2HeaderFilterStrategy with corrected sibling strategies as a defense-in-depth hardening measure.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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