CVE-2026-39910

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-08. a secondary CVSS source baseline 9.8; sources differ by 0.0.

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: 9.8Exploit: 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
9.8
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
23%
KEV
Not listed

Published

June 8, 2026

Last Modified

July 23, 2026

Advisory Details (2)

Auto-updated Aug 1, 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 35× in last 7d / 101× 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 271 total refreshes for this CVE.

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

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 July 23, 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 77.5% of all scored CVEs.
What is the CVSS score of CVE-2026-39910?
CVE-2026-39910 has a CVSS v3 base score of 9.8 (NVD).
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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