CVE-2026-34876

An issue was discovered in Mbed TLS 3.x before 3.6.6. An out-of-bounds read vulnerability in mbedtlsccmfinish in library/ccm.c allows attackers to obtain adjacent CCM context data via invocation of the multipart CCM API with an oversized taglen parameter. This is caused by missing validation of t...

PT-2026-29789

Name of the Vulnerable Software and Affected Versions Mbed TLS versions 3.0 through 3.6.5 Description An out-of-bounds read issue exists in the mbedtls ccm finish function within the library/ccm.c file of Mbed TLS. This allows attackers to potentially obtain adjacent CCM context data by invoking...