CVE-2026-5479 HIGH

CVE-2026-5479: wolfSSL EVP ChaCha20-Poly1305 AEAD authentication tag

Vendor Wolfssl
Product wolfSSL
Weakness CWE-354
Published April 10, 2026
Last update April 22, 2026
View on NVD All CVEs

CVSS base score

7.6/10
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

In wolfSSL's EVP layer, the ChaCha20-Poly1305 AEAD decryption path in wolfSSL_EVP_CipherFinal (and related EVP cipher finalization functions) fails to verify the authentication tag before returning plaintext to the caller. When an application uses the EVP API to perform ChaCha20-Poly1305 decryption, the implementation computes or accepts the tag but does not compare it against the expected value.

Key dates

02Disclosure timeline

April 10, 2026 CVE published
April 22, 2026 Record updated