High severity7.5OSV Advisory· Published Aug 3, 2026· Updated Aug 28, 2026
CVE-2026-13506
CVE-2026-13506
Description
In Bouncy Castle for Java before 1.85, Lazy ASN.1 sequence forcing resets nesting-depth guard. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.bouncycastle:bcprov-jdk18onMaven | < 1.85 | 1.85 |
org.bouncycastle:bc-fipsMaven | < 1.0.2.7 | 1.0.2.7 |
org.bouncycastle:bc-fipsMaven | >= 2.0.0, < 2.0.2 | 2.0.2 |
org.bouncycastle:bc-fipsMaven | >= 2.1.0, < 2.1.3 | 2.1.3 |
org.bouncycastle:bcprov-lts8onMaven | < 2.73.12 | 2.73.12 |
org.bouncycastle:bcprov-jdk15to18Maven | < 1.85 | 1.85 |
Affected products
10- 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, <1.0.2.7, <2.0.2, <2.1.3
cpe:2.3:a:bouncycastle:bouncy_castle_for_java_lts:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:bouncycastle:bouncy_castle_for_java_lts:*:*:*:*:*:*:*:*range: <=2.73.11
- (no CPE)range: <2.73.12
- cpe:2.3:a:bouncycastle:fips_java_api:*:*:*:*:*:*:*:*Range: >=1.0.0,<1.0.2.7
- Range: <1.0.2.7, <2.0.2, <2.1.3
- osv-coords3 versionspkg:apk/chainguard/bouncycastle-fipspkg:rpm/opensuse/bouncycastle&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/bouncycastle&distro=openSUSE%20Tumbleweed
< 2.1.3-r0+ 2 more
- (no CPE)range: < 2.1.3-r0
- (no CPE)range: < 1.85-160000.1.1
- (no CPE)range: < 1.85-1.1
Patches
Vulnerability mechanics
References
3News 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