CVE-2026-5229

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-15. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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.

The Form Notify plugin for WordPress is vulnerable to Authentication Bypass in versions up to and including 1.1.10. This is due to the plugin trusting user-controlled cookie data to determine which WordPress account to authenticate after a LINE OAuth login. When LINE doesn't provide an email address (which is common), the plugin falls back to reading the 'form_notify_line_email' cookie value without verifying that the LINE account is associated with that email address. This makes it possible for unauthenticated attackers to gain access to any user account on the site, including administrator accounts, by completing a LINE OAuth flow with their own LINE account while injecting a malicious cookie containing the target victim's email address.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
50.1%
KEV
Not listed

Published

May 15, 2026

Last Modified

May 15, 2026

Advisory Details (2)

Auto-updated Jun 21, 2026
Patch available. Sources: github_commit.
github_commit Patch Available

commit 9780764 (oberonlai/form-notify)

Patch available: oberonlai/form-notify 1.1.11 (contains commit 9780764)

https://github.com/oberonlai/form-notify/commit/9780764
github_commit Patch Available

commit 5eab0ea (oberonlai/form-notify)

Patch available: oberonlai/form-notify 1.1.10 (contains commit 5eab0ea)

https://github.com/oberonlai/form-notify/commit/5eab0ea

Vendor Advisories for CVE-2026-5229(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 / 86× 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 286 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-5229?
CVE-2026-5229 is a critical vulnerability published on May 15, 2026. The Form Notify plugin for WordPress is vulnerable to Authentication Bypass in versions up to and including 1.1.10. This is due to the plugin trusting user-controlled cookie data to determine which WordPress account to authenticate after a LINE OAuth login. When LINE doesn't provide an email…
When was CVE-2026-5229 disclosed?
CVE-2026-5229 was first published in the National Vulnerability Database on May 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5229 actively exploited?
CVE-2026-5229 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 50.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-5229?
CVE-2026-5229 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-5229?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5229, 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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