CVE-2026-25793
8.1 · HIGHOverview
CVE-2026-25793 is a high-severity vulnerability affecting slack nebula. It was published on February 6, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
Nebula is a scalable overlay networking tool. In versions from 1.7.0 to 1.10.2, when using P256 certificates (which is not the default configuration), it is possible to evade a blocklist entry created against the fingerprint of a certificate by using ECDSA Signature Malleability to use a copy of the certificate with a different fingerprint. This issue has been patched in version 1.10.3.
Remediation
Check the references section for vendor advisories and patches from slack. Update nebula to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| slack | nebula | >= 1.7.0, < 1.10.3 | Affected |
Frequently Asked Questions
What is CVE-2026-25793?
CVE-2026-25793 is a high-severity vulnerability affecting slack nebula. It was published on February 6, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).
How severe is CVE-2026-25793?
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-25793?
Check the references section for vendor advisories and patches from slack. Update nebula to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-25793?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-25793 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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