CVE-2026-4881

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-06-04. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

In affected versions of Octopus Server, permissions were not checked correctly resulting in any authenticated user being able to make server level changes using a certain API endpoint despite receiving an error.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
11%
KEV
Not listed

Published

June 4, 2026

Last Modified

July 22, 2026

Advisory Details (1)

Auto-updated Jun 13, 2026
No patch confirmed yet.
generic

Security Advisory 2026-04 | Octopus Deploy Security Advisories

https://advisories.octopus.com/post/2026/sa2026-04

Vendor Advisories for CVE-2026-4881(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 15× in last 7d / 50× 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 120 total refreshes for this CVE.

  1. 2026-08-01 12:57 UTCEG score recompute
  2. 2026-08-01 12:57 UTCGHSA enrichment
  3. 2026-08-01 04:16 UTCEPSS rescore
  4. 2026-07-31 05:28 UTCEG score recompute
  5. 2026-07-31 05:28 UTCGHSA enrichment
  6. 2026-07-30 16:28 UTCEPSS rescore
  7. 2026-07-30 01:30 UTCEPSS rescore
  8. 2026-07-29 10:11 UTCEG score recompute
  9. 2026-07-29 10:11 UTCGHSA enrichment
  10. 2026-07-28 15:37 UTCEPSS rescore
  11. 2026-07-28 03:24 UTCEG score recompute
  12. 2026-07-28 03:24 UTCGHSA enrichment
  13. 2026-07-26 22:25 UTCEG score recompute
  14. 2026-07-26 22:25 UTCGHSA enrichment
  15. 2026-07-26 14:54 UTCEPSS rescore
  16. 2026-07-25 14:18 UTCEPSS rescore
  17. 2026-07-24 14:18 UTCEPSS rescore
  18. 2026-07-23 14:18 UTCEPSS rescore
  19. 2026-07-23 03:18 UTCEG score recompute
  20. 2026-07-22 14:08 UTCEPSS rescore
  21. 2026-07-21 15:25 UTCEPSS rescore
  22. 2026-07-20 17:08 UTCEPSS rescore
  23. 2026-07-19 14:31 UTCEPSS rescore
  24. 2026-07-19 14:31 UTCEPSS rescore
  25. 2026-07-19 02:29 UTCEPSS rescore
Show 75 more
  1. 2026-07-18 10:04 UTCEPSS rescore
  2. 2026-07-16 17:03 UTCEPSS rescore
  3. 2026-07-16 00:21 UTCGHSA enrichment
  4. 2026-07-15 16:57 UTCEPSS rescore
  5. 2026-07-15 16:57 UTCEPSS rescore
  6. 2026-07-15 02:00 UTCEPSS rescore
  7. 2026-07-15 02:00 UTCEPSS rescore
  8. 2026-07-14 03:24 UTCGHSA enrichment
  9. 2026-07-13 22:31 UTCEPSS rescore
  10. 2026-07-13 06:13 UTCEPSS rescore
  11. 2026-07-13 06:13 UTCEPSS rescore
  12. 2026-07-12 05:46 UTCEPSS rescore
  13. 2026-07-11 12:25 UTCGHSA enrichment
  14. 2026-07-11 08:27 UTCEPSS rescore
  15. 2026-07-11 08:27 UTCEPSS rescore
  16. 2026-07-09 19:10 UTCEPSS rescore
  17. 2026-07-09 19:10 UTCEPSS rescore
  18. 2026-07-08 16:15 UTCGHSA enrichment
  19. 2026-07-08 15:16 UTCEPSS rescore
  20. 2026-07-07 13:46 UTCEPSS rescore
  21. 2026-07-06 16:27 UTCEPSS rescore
  22. 2026-07-06 02:23 UTCEPSS rescore
  23. 2026-07-05 02:30 UTCEPSS rescore
  24. 2026-07-04 06:31 UTCEPSS rescore
  25. 2026-07-03 22:12 UTCGHSA enrichment
  26. 2026-07-02 21:05 UTCGHSA enrichment
  27. 2026-07-01 20:49 UTCGHSA enrichment
  28. 2026-07-01 15:07 UTCEPSS rescore
  29. 2026-06-30 23:22 UTCEPSS rescore
  30. 2026-06-30 20:57 UTCEG score recompute▲ 0.50
  31. 2026-06-30 20:57 UTCGHSA enrichment
  32. 2026-06-30 20:33 UTCNVD updateCVSS v3 → 6.5
  33. 2026-06-29 14:23 UTCGHSA enrichment
  34. 2026-06-29 14:06 UTCEPSS rescore
  35. 2026-06-29 14:06 UTCEPSS rescore
  36. 2026-06-28 14:36 UTCGHSA enrichment
  37. 2026-06-28 14:07 UTCEPSS rescore
  38. 2026-06-28 04:56 UTCEPSS rescore
  39. 2026-06-28 04:56 UTCEPSS rescore
  40. 2026-06-27 14:48 UTCGHSA enrichment
  41. 2026-06-27 03:08 UTCEPSS rescore
  42. 2026-06-26 15:01 UTCGHSA enrichment
  43. 2026-06-25 13:49 UTCEPSS rescore
  44. 2026-06-25 08:55 UTCGHSA enrichment
  45. 2026-06-24 14:05 UTCEPSS rescore
  46. 2026-06-24 09:09 UTCGHSA enrichment
  47. 2026-06-23 21:33 UTCEPSS rescore
  48. 2026-06-23 21:33 UTCEPSS rescore
  49. 2026-06-23 04:35 UTCGHSA enrichment
  50. 2026-06-22 14:25 UTCEPSS rescore
  51. 2026-06-22 14:25 UTCEPSS rescore
  52. 2026-06-21 14:56 UTCEPSS rescore
  53. 2026-06-21 14:56 UTCEPSS rescore
  54. 2026-06-21 01:59 UTCEPSS rescore
  55. 2026-06-21 01:59 UTCEPSS rescore
  56. 2026-06-19 20:10 UTCGHSA enrichment
  57. 2026-06-19 19:26 UTCEPSS rescore
  58. 2026-06-19 19:26 UTCEPSS rescore
  59. 2026-06-18 17:52 UTCEPSS rescore
  60. 2026-06-18 17:52 UTCEPSS rescore
  61. 2026-06-18 07:45 UTCGHSA enrichment
  62. 2026-06-17 17:53 UTCEPSS rescore
  63. 2026-06-17 07:36 UTCGHSA enrichment
  64. 2026-06-16 17:53 UTCEPSS rescore
  65. 2026-06-16 07:23 UTCGHSA enrichment
  66. 2026-06-15 17:49 UTCEPSS rescore
  67. 2026-06-15 17:49 UTCEPSS rescore
  68. 2026-06-15 07:37 UTCGHSA enrichment
  69. 2026-06-14 23:18 UTCEPSS rescore
  70. 2026-06-14 07:49 UTCGHSA enrichment
  71. 2026-06-13 23:00 UTCEPSS rescore
  72. 2026-06-13 08:02 UTCGHSA enrichment
  73. 2026-06-12 23:12 UTCEPSS rescore
  74. 2026-06-12 23:12 UTCEPSS rescore
  75. 2026-06-12 08:14 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-4881?
CVE-2026-4881 is a medium vulnerability published on June 4, 2026. In affected versions of Octopus Server, permissions were not checked correctly resulting in any authenticated user being able to make server level changes using a certain API endpoint despite receiving an error.
When was CVE-2026-4881 disclosed?
CVE-2026-4881 was first published in the National Vulnerability Database on June 4, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-4881 actively exploited?
CVE-2026-4881 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 88.6% of all scored CVEs.
What is the CVSS score of CVE-2026-4881?
CVE-2026-4881 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-4881?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-4881, 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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