CVE-2026-2968 | Cesanta Mongoose up to 7.20 Poly1305 Authentication Tag /src/tls_chacha20.c mg_chacha20_poly1305_decrypt signature verification

A vulnerability categorized as critical has been discovered in Cesanta Mongoose up to 7.20. This impacts the function mg_chacha20_poly1305_decrypt of the file /src/tls_chacha20.c of the component Poly1305 Authentication Tag Handler. The manipulation results in improper verification of cryptographic signature.

This vulnerability is cataloged as CVE-2026-2968. The attack may be launched remotely. Furthermore, there is an exploit available.

The vendor was contacted early about this disclosure but did not respond in any way.