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CVE-2026-12802

CMS AuthEnvelopedData fails to enforce tag-length on decryption

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 1.85, 2.73.12, 1.0.12, 2.0.12, 2.1.12
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: partial

Summary

In Bouncy Castle for Java before 1.85, CMS AuthEnvelopedData fails to enforce tag-length on decryption. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series).

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • bcpkix

    fixed in 1.85

  • bcpkix-lts8on

    From 2.73.0 · fixed in 2.73.12

  • bcpkix-fips

    From 1.0.0 · fixed in 1.0.12; From 2.0.0 · fixed in 2.0.12; From 2.1.0 · fixed in 2.1.12

References 2

GitHub · bcgit/bc-java