Vulnerability · Published Aug 3, 2026 · Assigned by bcorg
CVE-2026-59645OER parser recurses without depth limit on self-referential IEEE 1609.2 schema
High 8.7
In plain English
A high-severity security flaw in BC-FJA from Legion of the Bouncy Castle Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
In Bouncy Castle for Java before 1.85, OER parser recurses without depth limit on self-referential IEEE 1609.2 schema. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcutil-fips 2.0.7 (2.0.X series) and 2.1.7 (2.1.X series).
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | bouncycastle | no fix listed | DEBIAN-CVE-2026-59645 |
| Debian:13 | bouncycastle | no fix listed | DEBIAN-CVE-2026-59645 |
| Debian:14 | bouncycastle | 1.86-1 | DEBIAN-CVE-2026-59645 |
| Ubuntu:26.04:LTS | bouncycastle | no fix listed | UBUNTU-CVE-2026-59645 |
| Ubuntu:26.10 | bouncycastle | no fix listed | UBUNTU-CVE-2026-59645 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Legion of the Bouncy Castle Inc. | BC-JAVA | 1.70 – before 1.85 |
| Legion of the Bouncy Castle Inc. | BC-LTS-JAVA | 2.73.0 – before 2.73.12 |
| Legion of the Bouncy Castle Inc. | BC-FJA | 2.0.0 – before 2.0.72.1.0 – before 2.1.7 |
Weakness: CWE-674 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Amber