CVE-2026-25793Nebula is a scalable overlay networking tool.
Updated under an hour ago ()
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It affects slack nebula. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.1 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-347
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
slack nebula slack:nebula | from 1.7.0 before 1.10.3 | NVD |
References
- https://github.com/slackhq/nebula/commit/f573e8a26695278f9d71587390fbfe0d0933aa21patch
- https://github.com/slackhq/nebula/security/advisories/GHSA-69x3-g4r3-p962vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.