CVE-2026-55967

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductWolfssl

PublishedJun 25, 2026

First seenJun 25, 2026

Weakness typeCWE-323CWE-323

How to fix

Update

wolfssl wolfssl5.9.2 or later

Patches

github.com/wolfSSL/wolfssl/pull/10709

Affected products

Product	Affected versions	Fixed in
wolfssl wolfssl	4.8.0 ≤ v < 5.9.2	5.9.2

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