CVE-2026-8149 (GCVE-0-2026-8149)

Vulnerability from cvelistv5 – Published: 2026-05-08 06:01 – Updated: 2026-07-21 04:59
VLAI
Title
GCM chunking can lead to bad tag exception on decryption
Summary
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.
Severity
5.1 (Medium)
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-08 12:50 UTC
CWE
Assigner
bcorg CNA under the mitre root
CNA scorecard B 84/100 over 74 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Legion of the Bouncy Castle Inc. BC-LTS Affected: 2.73.0 , < 2.73.11 (maven)
guessed Create a notification for this product.
Legion of the Bouncy Castle Inc. BC-FJA Affected: 2.1.0 , < 2.1.3 (maven)
guessed Create a notification for this product.
Credits
Michael Schäfer, Kiteworks
Show details on NVD website
To clipboard 

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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.