CVE-2026-116587: Go JOSE: DoS when parsing JWKs that contain RSA keys
CVE-2026-116587 is a vulnerability in Go JOSE: DoS when parsing JWKs that contain RSA keys, rated Moderate by Microsoft, with a CVSS 3.1 base score of 7.5 (High). An attacker can exploit it remotely over the network, without any privileges and without user interaction. Microsoft has not reported exploitation in the wild. The EPSS model estimates a 0.37% probability of exploitation activity in the next 30 days, higher than 30% of all scored vulnerabilities. Microsoft released the fix on 31 October 2026, outside Patch Tuesday. It affects 15 products in 2 product families (Open Source Software, Mariner).
Key facts
- CVE ID
- CVE-2026-116587
- Severity
- High CVSS 7.5
- Microsoft severity
- Moderate
- Exploited in the wild
- No
- Publicly disclosed
- No
- Weakness
- CWE-407; CWE-770
- EPSS
- 0.37% (percentile 30%)
- CISA KEV
- Not listed
- Released
- Last updated
- Patch Tuesday
- October 2026 Patch Tuesday
- Product families
- Open Source Software, Mariner
CVSS score and vector
Microsoft scores CVE-2026-116587 at 7.5 (temporal 6.9) using CVSS 3.1. Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U
| Metric | Value |
|---|---|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality impact | None |
| Integrity impact | None |
| Availability impact | High |
| Exploit code maturity | Unproven |
Affected products (15)
Open Source Software
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| azl3 azcopy 10.25.1-9 on Azure Linux 3.0 | Release Notes | Security Update | ||
| azl3 cert-manager 1.12.15-14 on Azure Linux 3.0 | Release Notes | Security Update | ||
| azl3 containerd2 2.3.4-1 on Azure Linux 3.0 | Release Notes | Security Update | ||
| azl3 containerized-data-importer 1.62.0-8 on Azure Linux 3.0 | Release Notes | Security Update | ||
| azl3 dcos-cli 1.2.0-22 on Azure Linux 3.0 | Release Notes | Security Update | ||
| azl3 ignition-flatcar 2.22.0-6 on Azure Linux 3.0 | Release Notes | Security Update | ||
| azl3 influxdb 2.7.5-21 on Azure Linux 3.0 | Release Notes | Security Update | ||
| azl3 keda 2.14.1-19 on Azure Linux 3.0 | Release Notes | Security Update | ||
| azl3 kubernetes 1.30.10-30 on Azure Linux 3.0 | Release Notes | Security Update | ||
| azl3 moby-containerd-cc 1.7.7-17 on Azure Linux 3.0 | Release Notes | Security Update | ||
| azl3 packer 1.9.5-21 on Azure Linux 3.0 | Release Notes | Security Update | ||
| azl3 skopeo 1.14.4-13 on Azure Linux 3.0 | Release Notes | Security Update | ||
| azl3 telegraf 1.31.0-33 on Azure Linux 3.0 | Release Notes | Security Update | ||
| azl3 vitess 19.0.4-14 on Azure Linux 3.0 | Release Notes | Security Update |
Mariner
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| azl3 libcontainers-common 20240213-3 on Azure Linux 3.0 | Release Notes | Security Update |
NIST NVD data
- NVD status
- Awaiting Analysis
- NVD CVSS
- 7.5 (HIGH)
- NVD weakness
- CWE-407; CWE-770
- Published to NVD
- NVD last modified
References
Revision history
| Version | Date | Description |
|---|---|---|
| 1.0 | Information published. |