CVE-2026-12860
MEDIUMCVSS 5.3/10EPSS 0.18%
Last modified
CVE-2026-12860 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. In Bouncy Castle for Java before 1.85, RSA PKCS#1 verification skips last two hash bytes in NULL-omitted path. This issue also affects Bouncy Castle for Java LTS before 2.73.12.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.
Description
In Bouncy Castle for Java before 1.85, RSA PKCS#1 verification skips last two hash bytes in NULL-omitted path. This issue also affects Bouncy Castle for Java LTS before 2.73.12.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Bouncycastle | Bc-Java | < 1.85 |
| Bouncycastle | Bouncy Castle For Java Lts | <= 2.73.11 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-12860?
In Bouncy Castle for Java before 1.85, RSA PKCS#1 verification skips last two hash bytes in NULL-omitted path. This issue also affects Bouncy Castle for Java LTS before 2.73.12.
How severe is CVE-2026-12860?
CVE-2026-12860 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2026-12860?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
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Are you affected by CVE-2026-12860?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST