Bouncy Castle for Java <=1.85: Lazy ASN.1 Sequence Nesting-depth Violation
CVE-2026-13506 Published on August 3, 2026
Lazy ASN.1 sequence forcing resets nesting-depth guard
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).
Vulnerability Analysis
CVE-2026-13506 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Stack Exhaustion Vulnerability?
The product does not properly control the amount of recursion which takes place, consuming excessive resources, such as allocated memory or the program stack.
CVE-2026-13506 has been classified to as a Stack Exhaustion vulnerability or weakness.
Affected Versions
Legion of the Bouncy Castle Inc. BC-JAVA:- Before 1.85 is affected.
- Version 2.73.0 and below 2.73.12 is affected.
- Version 1.0.0 and below 1.0.2.7 is affected.
- Version 2.0.0 and below 2.0.2 is affected.
- Version 2.1.0 and below 2.1.3 is affected.