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CVE-2026-8720

Опубликовано: 02 июл. 2026
Источник: msrc
CVSS3: 7.5
EPSS Низкий

Описание

HMAC-BLAKE2 final discards message when key length exceeds block size

EPSS

Процентиль: 2%
0.00111
Низкий

7.5 High

CVSS3

Связанные уязвимости

CVSS3: 7.5
ubuntu
около 1 месяца назад

wc_Blake2bHmacFinal and wc_Blake2sHmacFinal discard the message when the key length exceeds the block size, producing a MAC that is independent of the input. When the supplied key is longer than the BLAKE2 block size the key-hashing branch reinitialized the running hash state, discarding the accumulated message data, so the resulting MAC depended only on the key and not on the message being authenticated. This bug is specific to the HMAC-BLAKE2 APIs that were added in wolfSSL version 5.9.0.

CVSS3: 7.5
nvd
около 1 месяца назад

wc_Blake2bHmacFinal and wc_Blake2sHmacFinal discard the message when the key length exceeds the block size, producing a MAC that is independent of the input. When the supplied key is longer than the BLAKE2 block size the key-hashing branch reinitialized the running hash state, discarding the accumulated message data, so the resulting MAC depended only on the key and not on the message being authenticated. This bug is specific to the HMAC-BLAKE2 APIs that were added in wolfSSL version 5.9.0.

CVSS3: 7.5
debian
около 1 месяца назад

wc_Blake2bHmacFinal and wc_Blake2sHmacFinal discard the message when t ...

CVSS3: 7.5
github
около 1 месяца назад

wc_Blake2bHmacFinal and wc_Blake2sHmacFinal discard the message when the key length exceeds the block size, producing a MAC that is independent of the input. When the supplied key is longer than the BLAKE2 block size the key-hashing branch reinitialized the running hash state, discarding the accumulated message data, so the resulting MAC depended only on the key and not on the message being authenticated. This bug is specific to the HMAC-BLAKE2 APIs that were added in wolfSSL version 5.9.0.

EPSS

Процентиль: 2%
0.00111
Низкий

7.5 High

CVSS3