CVE-2026-28812

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-30. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

UserManager lack of checks allows impersonation in Apache JSPWiki up to 2.12.3 which may allow attackers to escalate privileges. Users are recommended to upgrade to version 2.12.4 or newer which fixes this issue.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

July 30, 2026

Last Modified

August 5, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-28812: Apache JSPWiki: UserManager does not sanity-check user database at startup

http://www.openwall.com/lists/oss-security/2026/07/30/15
generic
https://lists.apache.org/thread/n3m666d6t6871dldvz3ct49ooqkbgw2p

Vendor Advisories for CVE-2026-28812(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 57× in last 7d / 173× 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 173 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-28812?
CVE-2026-28812 is a critical vulnerability published on July 30, 2026. UserManager lack of checks allows impersonation in Apache JSPWiki up to 2.12.3 which may allow attackers to escalate privileges. Users are recommended to upgrade to version 2.12.4 or newer which fixes this issue.
When was CVE-2026-28812 disclosed?
CVE-2026-28812 was first published in the National Vulnerability Database on July 30, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-28812 actively exploited?
CVE-2026-28812 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 66.3% of all scored CVEs.
What is the CVSS score of CVE-2026-28812?
CVE-2026-28812 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-28812?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-28812, 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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