CVE-2026-25793

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Source
https://cve.org/CVERecord?id=CVE-2026-25793
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-25793.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-25793
Aliases
Downstream
CGA (16)
CLEANSTART (11)
MINI (1)
openSUSE (1)
SUSE (1)
Related
Published
2026-02-06T22:55:36Z
Modified
2026-10-16T02:58:39Z
Severity
  • 7.6 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Nebula Has Possible Blocklist Bypass via ECDSA Signature Malleability
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-347"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25793.json"
}
References

Affected packages

Git / github.com/slackhq/nebula

Affected ranges

Type
GIT
Repo
https://github.com/slackhq/nebula
Events
Introduced
7ae3cd25f80d87cdb7c0d3c6ecd9be447af46535
Fixed
f573e8a26695278f9d71587390fbfe0d0933aa21
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "1.7.0"
                },
                {
                    "fixed":  "1.10.3"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "f573e8a26695278f9d71587390fbfe0d0933aa21"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "cpe":  "cpe:2.3:a:slack:nebula:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "1.7.0"
                },
                {
                    "fixed":  "1.10.3"
                }
            ],
            "source":  "CPE_RANGE"
        }
    ]
}

Affected versions

v1.*
v1.10.0
v1.10.1
v1.10.2
v1.7.0
v1.7.1
v1.7.2
v1.8.0
v1.8.1
v1.8.2
v1.9.0
v1.9.1
v1.9.2
v1.9.3
v1.9.4

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-25793.json"