CVE-2026-8149CWE-1068

GCM chunking can lead to bad tag exception on decryption

Medium · published May 8, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
5.2
In the wild
Unconfirmed
What it is

A vulnerability in Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on on X86_64, AVX, AVX-512f, Linux, Legion of the Bouncy Castle Inc. BC-FJA bc-fips on Linux, X86_64, AVX, AVX-512f.

This vulnerability is associated with program files gcm128w, gcm512w, gcm128w.C, gcm512w.C.

This issue affects BC-LTS: from 2.73.0 before 2.73.11; BC-FJA: from 2.1.0 before 2.1.3.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/S:N/RE:M/U:Amber
EPSS
0.00158 · 5.2th percentile
Weakness
CWE-1068 · Inconsistency Between Implementation and Documented Design
Published
2026-05-08T06:01Z
EPSS history
Timeline
  • 08 MAY 06:01Z
    GCM chunking can lead to bad tag exception on decryption
    cvelistv5