CVE-2026-58278

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-07-03. the CNA's CVSS baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: None knownExposed: 0

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

Server-side request forgery (ssrf) in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

CVSS v3
5.4
EG Score
5.4(high)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

July 3, 2026

Last Modified

July 26, 2026

Advisory Details (1)

Auto-updated Jul 7, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58278

Vendor Advisories for CVE-2026-58278(2)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 76× 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. 2026-07-26 17:30 UTCEG score recompute
  2. 2026-07-26 17:30 UTCVendor advisory
  3. 2026-07-26 17:30 UTCGHSA enrichment
  4. 2026-07-26 14:54 UTCEPSS rescore
  5. 2026-07-26 14:54 UTCEPSS rescore
  6. 2026-07-26 05:10 UTCEG score recompute
  7. 2026-07-26 05:10 UTCVendor advisory
  8. 2026-07-26 05:09 UTCGHSA enrichment
  9. 2026-07-25 14:18 UTCEPSS rescore
  10. 2026-07-25 14:18 UTCEPSS rescore
  11. 2026-07-24 14:18 UTCEPSS rescore
  12. 2026-07-24 14:18 UTCEPSS rescore
  13. 2026-07-23 14:18 UTCEPSS rescore
  14. 2026-07-23 14:18 UTCEPSS rescore
  15. 2026-07-23 03:21 UTCEG score recompute
  16. 2026-07-22 14:08 UTCEPSS rescore
  17. 2026-07-22 14:08 UTCEPSS rescore
  18. 2026-07-21 15:25 UTCEPSS rescore
  19. 2026-07-21 15:25 UTCEPSS rescore
  20. 2026-07-20 17:08 UTCEPSS rescore
  21. 2026-07-19 14:31 UTCEPSS rescore
  22. 2026-07-19 14:31 UTCEPSS rescore
  23. 2026-07-19 03:46 UTCEG score recompute
  24. 2026-07-19 03:46 UTCVendor advisory
  25. 2026-07-19 03:46 UTCGHSA enrichment
Show 51 more
  1. 2026-07-19 02:29 UTCEPSS rescore
  2. 2026-07-18 10:04 UTCEPSS rescore
  3. 2026-07-17 01:46 UTCVendor advisory
  4. 2026-07-17 01:46 UTCGHSA enrichment
  5. 2026-07-16 17:03 UTCEPSS rescore
  6. 2026-07-15 23:30 UTCVendor advisory
  7. 2026-07-15 23:30 UTCGHSA enrichment
  8. 2026-07-15 16:57 UTCEPSS rescore
  9. 2026-07-15 16:57 UTCEPSS rescore
  10. 2026-07-15 02:00 UTCEPSS rescore
  11. 2026-07-15 02:00 UTCEPSS rescore
  12. 2026-07-14 21:13 UTCVendor advisory
  13. 2026-07-14 21:13 UTCGHSA enrichment
  14. 2026-07-13 22:31 UTCEPSS rescore
  15. 2026-07-13 18:56 UTCGHSA enrichment
  16. 2026-07-13 06:13 UTCEPSS rescore
  17. 2026-07-13 06:13 UTCEPSS rescore
  18. 2026-07-12 16:40 UTCVendor advisory
  19. 2026-07-12 16:40 UTCGHSA enrichment
  20. 2026-07-12 05:46 UTCEPSS rescore
  21. 2026-07-11 14:23 UTCVendor advisory
  22. 2026-07-11 14:23 UTCGHSA enrichment
  23. 2026-07-11 08:27 UTCEPSS rescore
  24. 2026-07-11 08:27 UTCEPSS rescore
  25. 2026-07-10 12:07 UTCVendor advisory
  26. 2026-07-10 12:07 UTCGHSA enrichment
  27. 2026-07-09 19:10 UTCEPSS rescore
  28. 2026-07-09 19:10 UTCEPSS rescore
  29. 2026-07-09 09:50 UTCVendor advisory
  30. 2026-07-09 09:50 UTCGHSA enrichment
  31. 2026-07-08 15:16 UTCEPSS rescore
  32. 2026-07-08 15:16 UTCEPSS rescore
  33. 2026-07-08 07:34 UTCVendor advisory
  34. 2026-07-08 07:34 UTCGHSA enrichment
  35. 2026-07-07 13:46 UTCEPSS rescore
  36. 2026-07-07 13:46 UTCEPSS rescore
  37. 2026-07-07 05:17 UTCVendor advisory
  38. 2026-07-07 05:17 UTCGHSA enrichment
  39. 2026-07-06 16:27 UTCEPSS rescore
  40. 2026-07-06 16:27 UTCEPSS rescore
  41. 2026-07-06 03:02 UTCVendor advisory
  42. 2026-07-06 03:02 UTCGHSA enrichment
  43. 2026-07-06 02:23 UTCEPSS rescore
  44. 2026-07-06 02:23 UTCEPSS rescore
  45. 2026-07-05 02:31 UTCEPSS rescore
  46. 2026-07-05 02:30 UTCEPSS rescore
  47. 2026-07-05 00:45 UTCVendor advisory
  48. 2026-07-05 00:44 UTCGHSA enrichment
  49. 2026-07-03 22:28 UTCEG score recompute
  50. 2026-07-03 22:28 UTCVendor advisory
  51. 2026-07-03 22:28 UTCGHSA enrichment

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-58278?
CVE-2026-58278 is a medium vulnerability published on July 3, 2026. Server-side request forgery (ssrf) in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
When was CVE-2026-58278 disclosed?
CVE-2026-58278 was first published in the National Vulnerability Database on July 3, 2026, with the most recent update on July 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58278 actively exploited?
CVE-2026-58278 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 79.6% of all scored CVEs.
What is the CVSS score of CVE-2026-58278?
CVE-2026-58278 has a CVSS v4.0 base score of 5.4 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-58278?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58278, 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

Explore the affected products and dependency analysis for CVE-2026-58278

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