CVE-2026-55967CWE-323

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

Low · published June 25, 2026

CVSS v4.0
2.0
EPSS
0%
Percentile
7.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
2.0 · LOW
Vector
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
EPSS
0.00182 · 7.4th percentile
Weakness
CWE-323 · Reusing a Nonce, Key Pair in Encryption
Published
2026-06-25T16:53Z
EPSS history
Timeline
  • 25 JUN 16:53Z
    AES-GCM streaming APIs do not reject >64 GiB cumulative single messages, enabling counter wrap and keystream reuse
    cvelistv5