Is CVE-2026-47859 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-47859?

CVE-2026-47859 has a CVSS v3 severity of MEDIUM (5.4).

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CVE-2026-47859

Description

RFC6587SyslogDeserializer, used by the Spring Integration syslog TCP inbound adapter to decode RFC 6587 / RFC 5424 frames, trusts the sender-supplied octet count of an octet-counted frame and allocates a byte array of exactly that size with no upper bound. Spring Integration 7.1.0 Spring Integration 7.0.0 - 7.0.5 Spring Integration 6.5.0 - 6.5.10 Spring Integration 6.4.0 - 6.4.12 Spring Integration 5.5.21 and earlier