Vulnerability details
CVE-2026-5479
wolfSSL wolfSSL
wolfSSL EVP ChaCha20-Poly1305 AEAD authentication tag
CVSS 4.0
7.6High
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.6High | 4.0 | CVEProject cvelistV5 (CNA) (wolfSSL) | 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 |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| wolfSSL | wolfSSL | v < 5.9.1 | CVEProject cvelistV5 (CNA) |
References and advisories
1
Kolun on Telegram @kolunsec
Exploited CVEs, key news and a daily digest
Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.
Details
- Published
- 2026-04-10
- Last updated
- 2026-04-22
- State
- Published
- Assigner (CNA)
- wolfSSL
Exploit prediction (EPSS)
0.2%
Probability of exploitation in 30 days
10.5%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-354Improper Validation of Integrity Check Value