CVE-2026-48611

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-12. 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 weekElevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

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

Improper authentication checks in the OAuth implementation allow account hijacking even when OAuth is not configured or enabled leading to unauthorized access in default installations.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
47.2%
KEV
Not listed

Published

June 12, 2026

Last Modified

June 12, 2026

References (1)

Vendor Advisories for CVE-2026-48611(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 74× in last 7d / 318× 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 318 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2026/CVE-2026-48611.yaml
    First seen Jan 1, 2026

    phpBB < 3.3.17 - Authentication Bypass

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-48611?
CVE-2026-48611 is a critical vulnerability published on June 12, 2026. Improper authentication checks in the OAuth implementation allow account hijacking even when OAuth is not configured or enabled leading to unauthorized access in default installations.
When was CVE-2026-48611 disclosed?
CVE-2026-48611 was first published in the National Vulnerability Database on June 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48611 actively exploited?
CVE-2026-48611 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 47.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-48611?
CVE-2026-48611 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-48611?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48611, 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

Explore the affected products and dependency analysis for CVE-2026-48611

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