Medium severity5.3OSV Advisory· Published Aug 3, 2026· Updated Aug 28, 2026

CVE-2026-59640

Description

In Bouncy Castle for Java before 1.85, OpenPGP CFB quick-check oracle active on symmetric/session-key paths. 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

Legion Of The Bouncy Castle Inc./Bc Javallm-create
Range: <1.85, <2.73.12, <1.0.13, <2.0.13, <2.1.13
Legion Of The Bouncy Castle Inc./bcpg-fipsllm-create
Range: <1.0.13, <2.0.13, <2.1.13
osv-coords2 versions
pkg:rpm/opensuse/bouncycastle&distro=openSUSE%20Tumbleweed pkg: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
Legion Of The Bouncy Castle Inc./Bc Lts JavaOSV
Range: r2rv73dot11, r2rv73dot10, r2rv73dot9, …

Patches

Vulnerability mechanics

References

github.com/bcgit/bc-java/commit/6b94b1c146cec1f565d9a85847fae511af77503envdPatch

News mentions

Bouncy Castle for Java: 25 Vulnerabilities Disclosed Together on August 3, 2026
Vypr Intelligence · Aug 3, 2026

cvss	0.345
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000