CVE-2026-48058
MEDIUMDescription
nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.2, internal/web/session.go and internal/web/oidc.go set HttpOnly and SameSite=Lax on every cookie but never Secure. A single plaintext request to the origin (operator on a LAN, mistyped URL, HTTP→HTTPS not strictly enforced, reverse proxy misconfiguration) discloses the session. This issue has been patched in version 0.3.2.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v4 Vector
Exploitability
Impact
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Exploit Intelligence
Low risk: more likely to be exploited than 9% of all known CVEs.
References
Related Vulnerabilities
Other CWE-614 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2021-3882 | Medium | 6.8 | 1.0% | - | Fix |
| CVE-2022-25151 | High | 7.5 | 0.8% | - | Fix |
| CVE-2020-27651 | Medium | 5.8 | 0.8% | - | Fix |
| CVE-2015-3207 | Medium | 5.3 | 0.7% | - | - |
| CVE-2022-24045 | Medium | 6.5 | 0.6% | - | Fix |
| CVE-2022-3174 | High | 7.5 | 0.6% | - | Fix |
Common questions
How do I fix CVE-2026-48058?
No published fix for CVE-2026-48058 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-48058 being actively exploited?
Not that we know of. CVE-2026-48058 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.19% is the estimated probability that it will be exploited in the next 30 days. That is higher than 9% of all scored CVEs.
How severe is CVE-2026-48058?
CVE-2026-48058 has a CVSS v4 base score of 4.6, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-30.