Vulnerability Details CVE-2026-12817
In Bouncy Castle for Java before 1.85, OpenPGP AEAD decryption skips final tag on chunk-aligned data. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpg-fips 1.0.13 (1.0.X series), 2.0.13 (2.0.X series) and 2.1.13 (2.1.X series).
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 6.0%
CVSS Severity
CVSS v3 Score 8.6
References
Products affected by CVE-2026-12817
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cpe:2.3:a:bouncycastle:bcpg-fips:1.0.7.1
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cpe:2.3:a:bouncycastle:bcpg-fips:2.0.10
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cpe:2.3:a:bouncycastle:bcpg-fips:2.0.11
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cpe:2.3:a:bouncycastle:bcpg-fips:2.0.12
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cpe:2.3:a:bouncycastle:bcpg-fips:2.0.8
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cpe:2.3:a:bouncycastle:bcpg-fips:2.0.9
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cpe:2.3:a:bouncycastle:bcpg-fips:2.1.10
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cpe:2.3:a:bouncycastle:bcpg-fips:2.1.11
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cpe:2.3:a:bouncycastle:bouncy_castle_for_java_lts:*