CVE-2026-63569
Legion of the Bouncy Castle Inc. bc-csharp
- Legion of the Bouncy Castle Inc. bc-csharp
- Critical
- CVSS 9.1
- EPSS 0.4%
- Fixed version listed
What to do
Fixed version listed
Affected products
| Product | Affected | Fixed in |
|---|---|---|
| Legion of the Bouncy Castle Inc. bc-csharp | before 2.7.0 | 2.7.0 |
Advisories and fixes
- Vendor advisory github.com
- Patch github.com
Scores and signals
- Exploitation
- No known exploitation
- Severity
- Critical, CVSS 9.1 (v4.0, scored by bcorg)
- EPSS
- 0.4% chance of exploitation in the next 30 days (EPSS from FIRST, as of Oct 25, 2026)
- CISA's SSVC decision points
- Exploitation: none. Automatable: yes. Technical impact: total. As of Oct 2, 2026.
- Weakness
- CWE-20: Improper Input Validation
- Vendor
- Legion of the Bouncy Castle Inc., bc-csharp
Timeline
- First listed as critical by cve.now. Affected and fixed versions come from the CVE record, once one is published.