CVE-2026-39908

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-08. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 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 on Windows contains a credential disclosure vulnerability that allows remote attackers to capture the NTLMv2 hash of the process user by configuring a job proxy source with a UNC path pointing to an attacker-controlled server. When the job starts, the application attempts to load proxies from the UNC path, triggering an SMB authentication attempt that discloses the NTLMv2 hash, which can then be relayed or cracked offline.

CVSS v3
6.5
EG Score
6.5(high)
EPSS
23.2%
KEV
Not listed

Published

June 8, 2026

Last Modified

June 9, 2026

Advisory Details (2)

Auto-updated Jun 12, 2026
No patch confirmed yet.
generic

OpenBullet2 0.3.2 NTLMv2 Hash Disclosure via UNC Path Proxy Source | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openbullet2-ntlmv2-hash-disclosure-via-unc-path-proxy-source
generic
https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openbullet2

Vendor Advisories for CVE-2026-39908(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 20× in last 7d / 91× 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.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-39908?
CVE-2026-39908 is a medium vulnerability published on June 8, 2026. OpenBullet2 through version 0.3.2 on Windows contains a credential disclosure vulnerability that allows remote attackers to capture the NTLMv2 hash of the process user by configuring a job proxy source with a UNC path pointing to an attacker-controlled server. When the job starts, the application…
When was CVE-2026-39908 disclosed?
CVE-2026-39908 was first published in the National Vulnerability Database on June 8, 2026, with the most recent update on June 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-39908 actively exploited?
CVE-2026-39908 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 23.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-39908?
CVE-2026-39908 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-39908?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39908, 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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