CVE-2026-12817In Bouncy Castle for Java before 1.85, OpenPGP AEAD decryption skips final tag on chunk-aligned data.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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).
- CVSS
- 8.6 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
- Weakness (CWE)
- CWE-354
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Aug 31, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
bouncycastle bc-java bouncycastle:bc-java | before 1.85 | NVD |
bouncycastle bcpg-fips bouncycastle:bcpg-fips | from 1.0.7 before 1.0.13; from 2.0.8 before 2.0.13; from 2.1.10 before 2.1.13 | NVD |
bouncycastle bouncy_castle_for_java_lts bouncycastle:bouncy_castle_for_java_lts | through 2.73.11 | NVD |
References
- https://github.com/bcgit/bc-java/commit/4b712819846ec944379f4909101abac20f0ad4b0patch
- https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9012817third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.