CVE-2026-48058

MEDIUMPre-NVD 4.64.6—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 91% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
4.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.6Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
4.6
EG Score
4.6(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity46% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

June 10, 2026

Last Modified

July 30, 2026

Advisory Details (3)

Auto-updated Jul 28, 2026
Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

v0.3.2

Patch available: forgekeep/nebula-mesh v0.3.2

https://github.com/forgekeep/nebula-mesh/releases/tag/v0.3.2
github_commit

commit ffdd67dbf221 (forgekeep/nebula-mesh)

Fix landed in forgekeep/nebula-mesh commit ffdd67dbf221 — awaiting tagged release

https://github.com/forgekeep/nebula-mesh/commit/ffdd67dbf221d9a5855c39fbe11b49c245048d85
github Patch Available

Session and OIDC state cookies lack the Secure attribute · Advisory · forgekeep/nebula-mesh · GitHub

https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-rqfj-vv8r-xhqc

Vendor Advisories for CVE-2026-48058(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/juev/nebula-mesh—0.3.2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 48× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-23 10:46 UTCEG score recompute
  2. 2026-08-23 00:19 UTCEPSS rescore
  3. 2026-08-21 23:49 UTCEPSS rescore
  4. 2026-08-21 15:50 UTCEG score recompute
  5. 2026-08-20 22:55 UTCEPSS rescore
  6. 2026-08-20 17:16 UTCEG score recompute
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 14:56 UTCEG score recompute
  9. 2026-08-18 13:48 UTCEPSS rescore
  10. 2026-08-17 01:43 UTCEG score recompute
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 03:18 UTCEG score recompute
  13. 2026-08-16 02:14 UTCEPSS rescore
  14. 2026-08-15 04:53 UTCEG score recompute
  15. 2026-08-15 01:30 UTCEPSS rescore
  16. 2026-08-14 06:19 UTCEG score recompute
  17. 2026-08-13 22:00 UTCEPSS rescore
  18. 2026-08-13 07:54 UTCEG score recompute
  19. 2026-08-12 13:51 UTCEPSS rescore
  20. 2026-08-12 08:55 UTCEG score recompute
  21. 2026-08-11 10:30 UTCEG score recompute
  22. 2026-08-11 00:00 UTCEPSS rescore
  23. 2026-08-10 12:06 UTCEG score recompute
  24. 2026-08-09 13:46 UTCEPSS rescore
  25. 2026-08-09 13:39 UTCEG score recompute
Show 28 more
  1. 2026-08-08 16:37 UTCEPSS rescore
  2. 2026-08-07 16:50 UTCEG score recompute
  3. 2026-08-06 18:25 UTCEG score recompute
  4. 2026-08-06 13:47 UTCEPSS rescore
  5. 2026-08-05 20:00 UTCEG score recompute
  6. 2026-08-05 19:17 UTCEPSS rescore
  7. 2026-08-04 15:54 UTCEG score recompute
  8. 2026-08-04 15:10 UTCEPSS rescore
  9. 2026-08-04 10:39 UTCEPSS rescore
  10. 2026-08-03 14:50 UTCEG score recompute
  11. 2026-08-03 10:36 UTCEPSS rescore
  12. 2026-08-02 12:02 UTCEG score recompute
  13. 2026-08-02 02:27 UTCEPSS rescore
  14. 2026-08-01 13:37 UTCEG score recompute
  15. 2026-08-01 04:16 UTCEPSS rescore
  16. 2026-07-30 16:47 UTCEG score recompute
  17. 2026-07-30 16:28 UTCEPSS rescore
  18. 2026-07-30 09:47 UTCEG score recompute
  19. 2026-07-30 01:30 UTCEPSS rescore
  20. 2026-07-28 19:27 UTCEG score recompute
  21. 2026-07-28 18:59 UTCEG score recompute▲ 4.60
  22. 2026-07-28 18:57 UTCMITRE cvelistV5CVSS v3 → 4.6 · CVSS v4 → 4.6
  23. 2026-07-26 20:57 UTCEG score recompute
  24. 2026-07-23 03:18 UTCEG score recompute
  25. 2026-06-14 23:18 UTCEPSS rescore
  26. 2026-06-13 23:00 UTCEPSS rescore
  27. 2026-06-12 23:12 UTCEPSS rescore
  28. 2026-06-10 19:17 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-48058?
CVE-2026-48058 is a medium vulnerability published on June 10, 2026. 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…
When was CVE-2026-48058 disclosed?
CVE-2026-48058 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48058 actively exploited?
CVE-2026-48058 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.6% of all scored CVEs.
What is the CVSS score of CVE-2026-48058?
CVE-2026-48058 has a CVSS v3 base score of 4.6 (NVD).
How do I remediate CVE-2026-48058?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48058, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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