CVE-2026-39910

CRITICALPre-NVD 8.89.8▲
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-08. a secondary CVSS source baseline 8.8; sources differ by 1.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

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

STACKIT IaaS API contains a missing authorization check vulnerability that allows authenticated, low-privileged attackers to escalate privileges to full organization compromise by attaching arbitrary service accounts to virtual machines they control. Attackers can exploit the unvalidated PUT servers service-accounts endpoint to attach high-privileged service accounts and query the Instance Metadata Service to retrieve OAuth2 tokens, bypassing tenant boundaries and gaining unauthorized control over the entire organization environment.

CVSS v3
8.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

June 8, 2026

Last Modified

August 24, 2026

Advisory Details (2)

Auto-updated Aug 22, 2026
No patch confirmed yet.
generic

STACKIT IaaS API Privilege Escalation via Service Account Attachment | Advisories | VulnCheck

https://www.vulncheck.com/advisories/stackit-iaas-api-privilege-escalation-via-service-account-attachment
generic

STACKIT Status

https://status.stackit.cloud

Vendor Advisories for CVE-2026-39910(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 10× in last 7d / 57× 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 432 total refreshes for this CVE.

  1. 2026-09-16 05:15 UTCEPSS rescore
  2. 2026-09-15 03:11 UTCEPSS rescore
  3. 2026-09-14 08:35 UTCGHSA enrichment
  4. 2026-09-14 04:49 UTCEG score recompute
  5. 2026-09-14 04:49 UTCGHSA enrichment
  6. 2026-09-13 16:47 UTCEPSS rescore
  7. 2026-09-12 15:01 UTCEPSS rescore
  8. 2026-09-11 14:53 UTCEPSS rescore
  9. 2026-09-11 09:37 UTCEPSS rescore
  10. 2026-09-10 09:34 UTCEPSS rescore
  11. 2026-09-08 22:00 UTCEPSS rescore
  12. 2026-09-07 16:01 UTCEPSS rescore
  13. 2026-09-06 13:47 UTCEPSS rescore
  14. 2026-09-04 05:06 UTCEPSS rescore
  15. 2026-09-02 14:12 UTCEPSS rescore
  16. 2026-09-01 13:53 UTCEPSS rescore
  17. 2026-09-01 04:39 UTCEPSS rescore
  18. 2026-08-31 01:50 UTCEG score recompute
  19. 2026-08-31 01:50 UTCGHSA enrichment
  20. 2026-08-30 19:17 UTCEPSS rescore
  21. 2026-08-30 01:22 UTCEPSS rescore
  22. 2026-08-28 21:41 UTCEPSS rescore
  23. 2026-08-27 14:25 UTCEPSS rescore
  24. 2026-08-26 14:46 UTCEPSS rescore
  25. 2026-08-25 13:49 UTCEPSS rescore
Show 75 more
  1. 2026-08-25 05:07 UTCGHSA enrichment
  2. 2026-08-25 01:21 UTCEG score recompute
  3. 2026-08-25 01:21 UTCGHSA enrichment
  4. 2026-08-24 11:23 UTCEG score recompute
  5. 2026-08-24 11:23 UTCGHSA enrichment
  6. 2026-08-24 10:42 UTCEG score recompute
  7. 2026-08-24 10:42 UTCGHSA enrichment
  8. 2026-08-24 10:41 UTCMITRE cvelistV5CVSS v3 → 8.8 · CVSS v4 → 8.7 · severity → HIGH
  9. 2026-08-23 23:46 UTCGHSA enrichment
  10. 2026-08-23 19:16 UTCGHSA enrichment
  11. 2026-08-23 15:30 UTCGHSA enrichment
  12. 2026-08-23 11:45 UTCEG score recompute
  13. 2026-08-23 11:45 UTCGHSA enrichment
  14. 2026-08-23 00:19 UTCEPSS rescore
  15. 2026-08-21 23:49 UTCEPSS rescore
  16. 2026-08-21 23:39 UTCGHSA enrichment
  17. 2026-08-21 19:54 UTCGHSA enrichment
  18. 2026-08-21 14:33 UTCGHSA enrichment
  19. 2026-08-21 10:30 UTCGHSA enrichment
  20. 2026-08-21 06:42 UTCGHSA enrichment
  21. 2026-08-21 00:58 UTCEG score recompute
  22. 2026-08-21 00:58 UTCGHSA enrichment
  23. 2026-08-20 22:55 UTCEPSS rescore
  24. 2026-08-20 21:13 UTCGHSA enrichment
  25. 2026-08-20 17:26 UTCGHSA enrichment
  26. 2026-08-20 09:28 UTCEG score recompute
  27. 2026-08-20 09:28 UTCGHSA enrichment
  28. 2026-08-19 17:03 UTCEPSS rescore
  29. 2026-08-18 13:48 UTCEPSS rescore
  30. 2026-08-17 14:09 UTCEG score recompute
  31. 2026-08-17 14:09 UTCGHSA enrichment
  32. 2026-08-17 13:47 UTCEPSS rescore
  33. 2026-08-17 10:25 UTCGHSA enrichment
  34. 2026-08-17 06:39 UTCGHSA enrichment
  35. 2026-08-17 01:50 UTCGHSA enrichment
  36. 2026-08-16 16:03 UTCEG score recompute
  37. 2026-08-16 16:03 UTCGHSA enrichment
  38. 2026-08-16 14:56 UTCEPSS rescore
  39. 2026-08-16 12:16 UTCGHSA enrichment
  40. 2026-08-16 08:32 UTCGHSA enrichment
  41. 2026-08-16 04:47 UTCEG score recompute
  42. 2026-08-16 04:47 UTCGHSA enrichment
  43. 2026-08-16 02:14 UTCEPSS rescore
  44. 2026-08-16 01:02 UTCGHSA enrichment
  45. 2026-08-15 19:28 UTCGHSA enrichment
  46. 2026-08-15 15:43 UTCGHSA enrichment
  47. 2026-08-15 11:57 UTCGHSA enrichment
  48. 2026-08-15 05:11 UTCEG score recompute
  49. 2026-08-15 05:11 UTCGHSA enrichment
  50. 2026-08-15 01:30 UTCEPSS rescore
  51. 2026-08-15 01:25 UTCGHSA enrichment
  52. 2026-08-14 21:41 UTCGHSA enrichment
  53. 2026-08-14 17:56 UTCGHSA enrichment
  54. 2026-08-14 13:29 UTCGHSA enrichment
  55. 2026-08-14 09:41 UTCGHSA enrichment
  56. 2026-08-14 05:56 UTCGHSA enrichment
  57. 2026-08-14 02:11 UTCGHSA enrichment
  58. 2026-08-13 22:26 UTCEG score recompute
  59. 2026-08-13 22:26 UTCGHSA enrichment
  60. 2026-08-13 22:00 UTCEPSS rescore
  61. 2026-08-13 15:03 UTCGHSA enrichment
  62. 2026-08-13 10:30 UTCGHSA enrichment
  63. 2026-08-13 06:43 UTCGHSA enrichment
  64. 2026-08-13 02:58 UTCGHSA enrichment
  65. 2026-08-12 23:13 UTCGHSA enrichment
  66. 2026-08-12 19:28 UTCGHSA enrichment
  67. 2026-08-12 15:43 UTCEG score recompute
  68. 2026-08-12 15:43 UTCGHSA enrichment
  69. 2026-08-12 13:51 UTCEPSS rescore
  70. 2026-08-12 11:49 UTCGHSA enrichment
  71. 2026-08-12 08:03 UTCGHSA enrichment
  72. 2026-08-12 03:21 UTCGHSA enrichment
  73. 2026-08-11 23:36 UTCGHSA enrichment
  74. 2026-08-11 19:51 UTCGHSA enrichment
  75. 2026-08-11 16:06 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-39910?
CVE-2026-39910 is a critical vulnerability published on June 8, 2026. STACKIT IaaS API contains a missing authorization check vulnerability that allows authenticated, low-privileged attackers to escalate privileges to full organization compromise by attaching arbitrary service accounts to virtual machines they control. Attackers can exploit the unvalidated PUT…
When was CVE-2026-39910 disclosed?
CVE-2026-39910 was first published in the National Vulnerability Database on June 8, 2026, with the most recent update on August 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-39910 actively exploited?
CVE-2026-39910 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 82.0% of all scored CVEs.
What is the CVSS score of CVE-2026-39910?
CVE-2026-39910 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.
How do I remediate CVE-2026-39910?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39910, 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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