Vulnerability in Wolfssl
CVE-2026-55967
AES-GCM encryption/decryption with extremely large cumulative single message sizes (>64 GiB) were not properly rejected by the streaming APIs, allowing counter wrap, keystream reuse, and consequent plaintext recovery.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (7.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Wolfssl — versions 4.8.0
Weakness classification (CWE)
References
- github.com/wolfSSL/wolfssl/pull/10709 (Patch, patch, Issue Tracking)
- www.wolfssl.com/docs/security-vulnerabilities/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-55967?
- CVE-2026-55967 is a high-severity vulnerability in Wolfssl, classified under Reusing a Nonce, Key Pair in Encryption. CVSS score: 7.5/10. Published 2026-06-25.
- How severe is CVE-2026-55967?
- High severity. CVSS v3 base score is 7.5 out of 10.