CVE-2026-48611

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM 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
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 4%CVSS: 9.8Exploit: Elevated riskExposed: 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(medium)
EG Risk
65(Track*)
EG Risk 65/100SSVC: 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%
Exploitation40% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
4%
EPSS %ILE
89%
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 12× in last 7d / 160× 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 427 total refreshes for this CVE.

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

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 4% probability of exploitation in the next 30 days, which ranks it in the top 10.6% of all scored CVEs.
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

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