CVE-2026-48058 json
nebula-mesh: Session and OIDC state cookies lack the Secure attribute
published 2026-06-10 4 mo ago modified 2026-10-23 16 d ago also GHSA-rqfj-vv8r-xhqc , GO-2026-5635 , EUVD-2026-49991
- cvss
- 4.6
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 15%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/juev/nebula-mesh 0.3.2
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-rqfj-vv8r-xhqc referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 4.6 | 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 |
| CNA | 4.0 | 4.6 | 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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/juev/nebula-mesh | <0.3.2 |
0.3.2 |
Affected products
- juev nebula-mesh
Classification
- Weakness
-
- CWE-614 Sensitive Cookie in HTTPS Session Without 'Secure' Attribute
References
-
github.com
/forgekeep/nebula-mesh/commit/ffdd67dbf221d9a5855c39fbe11b49c245048d85
web
-
github.com
/forgekeep/nebula-mesh/security/advisories/GHSA-rqfj-vv8r-xhqc
exploit
- github.com /forgekeep/nebula-mesh/releases/tag/v0.3.2
-
github.com
/juev/nebula-mesh/security/advisories/GHSA-rqfj-vv8r-xhqc
web, advisory
-
github.com
/juev/nebula-mesh
package
Sources
- CVE List CVE-2026-48058
- GitHub Advisory GHSA-rqfj-vv8r-xhqc
- NVD CVE-2026-48058
- OSV GO-2026-5635
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.