CVE-2026-8149

GCM chunking can lead to bad tag exception on decryption

CVSS 5.1 MEDIUMEPSS 0.2%CWE-1068

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.1EPSS 0.2%KEV nãoPoC —Patch referenciado

Lifecycle

08 May 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

A vulnerability in Legion of the Bouncy Castle Inc. BC-LTS on Linux, X86_64, AVX, AVX-512f. This vulnerability is associated with program files gcm128w, gcm512w. This issue affects BC-LTS: from 2.73.0 before 2.73.11.

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

Affected products

Legion of the Bouncy Castle Inc. · BC-LTS

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References

https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%908149