CVE-2026-48558

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreHIGH confidence

Score elevated to 10.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-06-29), indicating real-world exploitation has been confirmed by US federal agencies. a secondary CVSS source baseline 10.0 retained for reference (NVD's own analysis pending). Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, secondary
Trending — KEV-added this weekExploited in the wild
10.0
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 1%CVSS: 10.0Exploit: NoneExposed: 0

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

SimpleHelp versions 5.5.15 and prior and 6.0 pre-release versions contain an authentication bypass vulnerability in the OIDC authentication flow. When OIDC authentication is configured, identity tokens submitted during login are accepted without verifying their cryptographic signature. In a vulnerable configuration, a remote, unauthenticated attacker can submit a forged token containing arbitrary identity claims to obtain a fully authenticated technician session. In some configurations, this may also allow bypass of multi-factor authentication. No user interaction is required.

CVSS v3
10.0
EG Score
10.0(high)
EPSS
63.3%
KEV
⚠ Exploited

Published

June 12, 2026

Last Modified

June 30, 2026

Advisory Details (5)

Auto-updated Jun 30, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48558
generic

A Djinn in the Machine: TaskWeaver’s Node.js Intrusion Chain - Blackpoint Cyber

https://blackpointcyber.com/blog/a-djinn-in-the-machine-taskweavers-node-js-intrusion-chain/
generic

SimpleHelp Security Update (2026-05)

https://simple-help.com/security/simplehelp-security-update-2026-05
generic

SimpleHelp | Release News

https://simple-help.com/release-news
generic

CVE-2026-48558: SimpleHelp Auth Bypass IOCs | Horizon3.ai

https://horizon3.ai/attack-research/disclosures/cve-2026-48558-simplehelp-authentication-bypass-iocs/

Vendor Advisories for CVE-2026-48558(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 85× in last 7d / 303× 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 303 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCJ4ck3LSyN-Gen2/CVE-2026-48558
    First seen Jul 2, 2026

    SimpleHelp OIDC Authentication Bypass PoC

    Open source ↗

Frequently asked(6)

What is CVE-2026-48558?
CVE-2026-48558 is a critical vulnerability published on June 12, 2026. SimpleHelp versions 5.5.15 and prior and 6.0 pre-release versions contain an authentication bypass vulnerability in the OIDC authentication flow. When OIDC authentication is configured, identity tokens submitted during login are accepted without verifying their cryptographic signature. In a…
When was CVE-2026-48558 disclosed?
CVE-2026-48558 was first published in the National Vulnerability Database on June 12, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48558 actively exploited?
Yes. CISA added CVE-2026-48558 to the Known Exploited Vulnerabilities catalog on June 29, 2026, affecting SimpleHelp SimpleHelp. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2026-48558?
CVE-2026-48558 has a CVSS v3 base score of 10.0 (NVD).
Which products are affected by CVE-2026-48558?
CVE-2026-48558 affects SimpleHelp SimpleHelp. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2026-48558?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48558, 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-2026-48558

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