CVE-2026-25856

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-08. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
8.8EG
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: Elevated riskExposed: 0

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

OpenBullet2 through version 0.3.2 contains an authenticated remote code execution vulnerability that allows authenticated users to execute arbitrary C# code on the server host by creating or modifying job configurations. Attackers can leverage the plain C# execution mode, which lacks reference filtering or API restrictions, to access the file system, spawn processes, and invoke arbitrary .NET APIs as the process user.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: 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
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

June 8, 2026

Last Modified

July 23, 2026

Advisory Details (2)

Auto-updated Jun 8, 2026
No patch confirmed yet.
generic

OpenBullet2 0.3.2 Authenticated RCE via Job Configuration Interface | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openbullet2-authenticated-rce-via-job-configuration-interface
generic
https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2

Vendor Advisories for CVE-2026-25856(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 21× 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.

Showing the most recent 100 of 156 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-25856?
CVE-2026-25856 is a high vulnerability published on June 8, 2026. OpenBullet2 through version 0.3.2 contains an authenticated remote code execution vulnerability that allows authenticated users to execute arbitrary C# code on the server host by creating or modifying job configurations. Attackers can leverage the plain C# execution mode, which lacks reference…
When was CVE-2026-25856 disclosed?
CVE-2026-25856 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-2026-25856 actively exploited?
CVE-2026-25856 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 61.6% of all scored CVEs.
What is the CVSS score of CVE-2026-25856?
CVE-2026-25856 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-25856?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-25856, 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.

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