CVE-2026-58465 — Eclipse Wakaama CoAP Block1 Handler Unbounded Memory Allocation DoS
Eclipse Wakaama before snapshot/2026-05-26 contains an unbounded memory allocation vulnerability in the CoAP Block1 handler within coap/block.c that allows unauthenticated remot…
Published: 2026-07-02 · CVSS: 8.7 · CVSS 4.0
Eclipse Wakaama before snapshot/2026-05-26 contains an unbounded memory allocation vulnerability in the CoAP Block1 handler within coap/block.c that allows unauthenticated remote attackers to exhaust server memory by sending a sequence of Block1 PUT requests with incrementing block numbers. Attackers can target the registration endpoint over UDP without authentication, causing the server to repeatedly reallocate a growing accumulation buffer by appending each block payload without enforcing any maximum total size limit, resulting in denial of service through memory exhaustion.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7