CVE-2026-26135

CRITICALNVD 8.89.6▲
EchelonGraph scoreMEDIUM confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-03. NVD baseline CVSS 8.8; sources differ by 0.8.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: 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 Azure Custom Locations Resource Provider (RP) allows an authorized attacker to elevate privileges over a network.

CVSS v3
8.8
EG Score
9.6(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity96% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

April 3, 2026

Last Modified

August 14, 2026

Advisory Details (1)

Auto-updated May 20, 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-2026-26135

Vendor Advisories for CVE-2026-26135(1)

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 5× in last 7d / 28× 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.

Showing the most recent 100 of 293 total refreshes for this CVE.

  1. 2026-09-13 16:47 UTCEPSS rescore
  2. 2026-09-12 15:01 UTCEPSS rescore
  3. 2026-09-11 14:52 UTCEPSS rescore
  4. 2026-09-10 09:34 UTCEPSS rescore
  5. 2026-09-08 22:00 UTCEPSS rescore
  6. 2026-09-07 16:01 UTCEPSS rescore
  7. 2026-09-06 13:47 UTCEPSS rescore
  8. 2026-09-06 13:47 UTCEPSS rescore
  9. 2026-09-04 05:06 UTCEPSS rescore
  10. 2026-09-02 14:11 UTCEPSS rescore
  11. 2026-09-01 13:53 UTCEPSS rescore
  12. 2026-09-01 04:39 UTCEPSS rescore
  13. 2026-08-30 19:17 UTCEPSS rescore
  14. 2026-08-30 01:22 UTCEPSS rescore
  15. 2026-08-28 21:41 UTCEPSS rescore
  16. 2026-08-27 14:25 UTCEPSS rescore
  17. 2026-08-26 14:46 UTCEPSS rescore
  18. 2026-08-25 13:48 UTCEPSS rescore
  19. 2026-08-23 00:19 UTCEPSS rescore
  20. 2026-08-21 23:49 UTCEPSS rescore
  21. 2026-08-20 22:55 UTCEPSS rescore
  22. 2026-08-19 17:03 UTCEPSS rescore
  23. 2026-08-18 13:48 UTCEPSS rescore
  24. 2026-08-17 13:47 UTCEPSS rescore
  25. 2026-08-16 14:56 UTCEPSS rescore
Show 75 more
  1. 2026-08-16 09:20 UTCEG score recompute
  2. 2026-08-16 09:20 UTCVendor advisory
  3. 2026-08-16 09:20 UTCGHSA enrichment
  4. 2026-08-16 02:14 UTCEPSS rescore
  5. 2026-08-15 01:30 UTCEPSS rescore
  6. 2026-08-15 00:18 UTCVendor advisory
  7. 2026-08-15 00:18 UTCGHSA enrichment
  8. 2026-08-14 20:35 UTCVendor advisory
  9. 2026-08-14 20:35 UTCGHSA enrichment
  10. 2026-08-14 16:52 UTCVendor advisory
  11. 2026-08-14 16:52 UTCGHSA enrichment
  12. 2026-08-14 13:11 UTCVendor advisory
  13. 2026-08-14 13:11 UTCGHSA enrichment
  14. 2026-08-14 09:28 UTCGHSA enrichment
  15. 2026-08-14 05:46 UTCEG score recompute
  16. 2026-08-14 05:46 UTCVendor advisory
  17. 2026-08-14 05:46 UTCGHSA enrichment
  18. 2026-08-13 22:00 UTCEPSS rescore
  19. 2026-08-13 09:57 UTCVendor advisory
  20. 2026-08-13 09:57 UTCGHSA enrichment
  21. 2026-08-13 03:26 UTCGHSA enrichment
  22. 2026-08-12 23:42 UTCGHSA enrichment
  23. 2026-08-12 20:00 UTCEG score recompute
  24. 2026-08-12 20:00 UTCVendor advisory
  25. 2026-08-12 20:00 UTCGHSA enrichment
  26. 2026-08-12 13:50 UTCEPSS rescore
  27. 2026-08-12 00:40 UTCVendor advisory
  28. 2026-08-12 00:40 UTCGHSA enrichment
  29. 2026-08-11 20:26 UTCEG score recompute
  30. 2026-08-11 20:26 UTCVendor advisory
  31. 2026-08-11 20:26 UTCGHSA enrichment
  32. 2026-08-11 13:42 UTCEPSS rescore
  33. 2026-08-11 07:10 UTCVendor advisory
  34. 2026-08-11 07:10 UTCGHSA enrichment
  35. 2026-08-11 03:28 UTCEG score recompute
  36. 2026-08-11 03:28 UTCVendor advisory
  37. 2026-08-11 03:27 UTCGHSA enrichment
  38. 2026-08-11 00:00 UTCEPSS rescore
  39. 2026-08-10 11:58 UTCVendor advisory
  40. 2026-08-10 11:58 UTCGHSA enrichment
  41. 2026-08-10 07:34 UTCVendor advisory
  42. 2026-08-10 07:34 UTCGHSA enrichment
  43. 2026-08-10 03:51 UTCGHSA enrichment
  44. 2026-08-10 00:09 UTCVendor advisory
  45. 2026-08-10 00:09 UTCGHSA enrichment
  46. 2026-08-09 20:26 UTCGHSA enrichment
  47. 2026-08-09 16:44 UTCEG score recompute
  48. 2026-08-09 16:44 UTCVendor advisory
  49. 2026-08-09 16:44 UTCGHSA enrichment
  50. 2026-08-09 13:46 UTCEPSS rescore
  51. 2026-08-09 12:59 UTCVendor advisory
  52. 2026-08-09 12:59 UTCGHSA enrichment
  53. 2026-08-09 08:59 UTCVendor advisory
  54. 2026-08-09 08:59 UTCGHSA enrichment
  55. 2026-08-09 05:17 UTCEG score recompute
  56. 2026-08-09 05:17 UTCGHSA enrichment
  57. 2026-08-08 16:37 UTCEPSS rescore
  58. 2026-08-08 09:56 UTCGHSA enrichment
  59. 2026-08-08 06:14 UTCVendor advisory
  60. 2026-08-08 06:14 UTCGHSA enrichment
  61. 2026-08-08 02:31 UTCGHSA enrichment
  62. 2026-08-07 22:48 UTCGHSA enrichment
  63. 2026-08-07 19:06 UTCEG score recompute
  64. 2026-08-07 19:06 UTCVendor advisory
  65. 2026-08-07 19:06 UTCGHSA enrichment
  66. 2026-08-07 15:24 UTCVendor advisory
  67. 2026-08-07 15:24 UTCGHSA enrichment
  68. 2026-08-06 17:43 UTCEG score recompute
  69. 2026-08-06 17:43 UTCVendor advisory
  70. 2026-08-06 17:43 UTCGHSA enrichment
  71. 2026-08-06 13:46 UTCEPSS rescore
  72. 2026-08-06 13:17 UTCVendor advisory
  73. 2026-08-06 13:17 UTCGHSA enrichment
  74. 2026-08-06 07:47 UTCVendor advisory
  75. 2026-08-06 07:47 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-26135?
CVE-2026-26135 is a critical vulnerability published on April 3, 2026. Server-side request forgery (ssrf) in Azure Custom Locations Resource Provider (RP) allows an authorized attacker to elevate privileges over a network.
When was CVE-2026-26135 disclosed?
CVE-2026-26135 was first published in the National Vulnerability Database on April 3, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-26135 actively exploited?
CVE-2026-26135 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 53.4% of all scored CVEs.
What is the CVSS score of CVE-2026-26135?
CVE-2026-26135 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.6.
How do I remediate CVE-2026-26135?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-26135, 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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