High severity8.6OSV Advisory· Published Aug 3, 2026· Updated Aug 31, 2026
CVE-2026-12817
CVE-2026-12817
Description
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).
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
8- Range: r2rv73dot11, r2rv73dot10, r2rv73dot9, …
cpe:2.3:a:bouncycastle:bc-java:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:bouncycastle:bc-java:*:*:*:*:*:*:*:*range: <1.85
- (no CPE)range: <1.85, <2.73.12, <1.0.13, <2.0.13, <2.1.13
cpe:2.3:a:bouncycastle:bcpg-fips:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:bouncycastle:bcpg-fips:*:*:*:*:*:*:*:*range: >=1.0.7,<1.0.13
- (no CPE)range: <1.0.13, <2.0.13, <2.1.13
- cpe:2.3:a:bouncycastle:bouncy_castle_for_java_lts:*:*:*:*:*:*:*:*Range: <=2.73.11
- osv-coords2 versionspkg:rpm/opensuse/bouncycastle&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/bouncycastle&distro=openSUSE%20Leap%2016.0
< 1.85-1.1+ 1 more
- (no CPE)range: < 1.85-1.1
- (no CPE)range: < 1.85-160000.1.1
Patches
Vulnerability mechanics
References
1News mentions
2- Bouncy Castle for Java: 25 Vulnerabilities Disclosed Together on August 3, 2026Vypr Intelligence · Aug 3, 2026
- Bouncy Castle for Java: 25 Vulnerabilities Disclosed in Single Batch on August 3, 2026Vypr Intelligence · Aug 3, 2026