CVE-2026-5479 | THREATINT

Description

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.

PUBLISHED Reserved 2026-04-03 | Published 2026-04-10 | Updated 2026-04-22 | Assigner wolfSSL

HIGH: 7.6CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-354 Improper Validation of Integrity Check Value

Product status

Default status

unaffected

Any version before 5.9.1

affected

Credits

Calif.io in collaboration with Claude and Anthropic Research finder

References

github.com/wolfSSL/wolfssl/pull/10102

cve.org (CVE-2026-5479)

nvd.nist.gov (CVE-2026-5479)

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