CVE-2026-12802In Bouncy Castle for Java before 1.85, CMS AuthEnvelopedData fails to enforce tag-length on decryption.
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No exploitation reported and no EPSS estimate yet.
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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).
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- 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
- Sep 2, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
bouncycastle bc-java bouncycastle:bc-java | before 1.85 | NVD |
bouncycastle bcpkix-fips bouncycastle:bcpkix-fips | before 1.0.12; from 2.0.7 before 2.0.12; from 2.1.8 before 2.1.12 | 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/0fefa539e6ac5c66e1daee5a13b23d1d4769cc01patch
- https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9012802third-party-advisory, patch
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.