Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 1.8%
CVSS Severity
CVSS v3 Score 7.5
References
Products affected by CVE-2026-55967
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cpe:2.3:a:wolfssl:wolfssl:4.8.0
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cpe:2.3:a:wolfssl:wolfssl:4.8.1
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cpe:2.3:a:wolfssl:wolfssl:5.0.0
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cpe:2.3:a:wolfssl:wolfssl:5.1.0
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cpe:2.3:a:wolfssl:wolfssl:5.1.1
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cpe:2.3:a:wolfssl:wolfssl:5.2.0
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cpe:2.3:a:wolfssl:wolfssl:5.2.1
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cpe:2.3:a:wolfssl:wolfssl:5.3.0
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cpe:2.3:a:wolfssl:wolfssl:5.4.0
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cpe:2.3:a:wolfssl:wolfssl:5.5.0
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cpe:2.3:a:wolfssl:wolfssl:5.5.1
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cpe:2.3:a:wolfssl:wolfssl:5.5.2
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cpe:2.3:a:wolfssl:wolfssl:5.5.3
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cpe:2.3:a:wolfssl:wolfssl:5.5.4
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cpe:2.3:a:wolfssl:wolfssl:5.6.0
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cpe:2.3:a:wolfssl:wolfssl:5.6.2
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cpe:2.3:a:wolfssl:wolfssl:5.6.3
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cpe:2.3:a:wolfssl:wolfssl:5.6.4
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cpe:2.3:a:wolfssl:wolfssl:5.6.6
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cpe:2.3:a:wolfssl:wolfssl:5.7.0
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cpe:2.3:a:wolfssl:wolfssl:5.7.2
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cpe:2.3:a:wolfssl:wolfssl:5.7.4
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cpe:2.3:a:wolfssl:wolfssl:5.7.6
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cpe:2.3:a:wolfssl:wolfssl:5.8.0
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cpe:2.3:a:wolfssl:wolfssl:5.8.2
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cpe:2.3:a:wolfssl:wolfssl:5.8.4