CVE-2026-5479 wolfSSL EVP ChaCha20-Poly1305 AEAD authentication tag
wolfSSL fails to verify ChaCha20-Poly1305 authentication tags during EVP decryption, allowing attackers to bypass integrity checks and inject tampered data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-5479?
CVE-2026-5479 is a high-severity vulnerability in Wolfssl Wolfssl, published on 10 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-354
Which versions are affected by CVE-2026-5479?
It affects 1 product.
Products include Wolfssl Wolfssl.
How do I fix CVE-2026-5479?
Apply the vendor's patch.
Is CVE-2026-5479 being exploited?
There is no known exploitation of CVE-2026-5479 in the wild and no public exploit code.
Other vulnerabilities in Wolfssl Wolfssl
Sources
Also known as DEBIAN-CVE-2026-5479, GHSA-3xr8-r75g-g9c6, JLSEC-2026-728, UBUNTU-CVE-2026-5479.