Vulnerability details
CVE-2026-59644
Legion of the Bouncy Castle BC-JAVA
MLS hash-ratchet honours arbitrary 32-bit generation counter from sender
CVSS 4.0
8.7High
Official description
In Bouncy Castle for Java before 1.85, MLS hash-ratchet honours arbitrary 32-bit generation counter from sender.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.7High | 4.0 | CVEProject cvelistV5 (CNA) (bcorg) | 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 |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Legion of the Bouncy Castle Inc. | BC-JAVA | 1.73 ≤ v < 1.85 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2026-08-03
- Last updated
- 2026-08-03
- State
- Published
- Assigner (CNA)
- bcorg
Exploit prediction (EPSS)
0.49%
Probability of exploitation in 30 days
42.6%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-834Excessive Iteration