CVE-2026-55967

AES-GCM streaming APIs do not reject >64 GiB cumulative single messages, enabling counter wrap and keystream reuse

State: Published
Severity: 2.0 Low
Published: Jun 25, 2026
Updated: Jun 25, 2026
Reserved: Jun 17, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	2.0 Low	CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N	wolfSSL

Weaknesses

CWE-323 Reusing a Nonce, Key Pair in Encryption

Affected Products

Product	Versions
wolfSSLwolfSSL	4.8.0 through 5.9.1Affected

References

https://github.com/wolfSSL/wolfssl/pull/10709patch
https://www.wolfssl.com/docs/security-vulnerabilities/

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