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. the CNA's CVSS baseline 10.0 retained for reference (NVD's own analysis pending). Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, cna:vulncheck, epss, ghsa
Trending — 4 sources updated this weekExploited in the wild
10.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 64%CVSS: 10.0Exploit: cisa kev · ssvc active · Metasploit · epss top5pct · epss high · public exploitExposed: 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)
EG Risk
100(Act)
EG Risk 100/100SSVC: Act

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
Severity100% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
64%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

June 12, 2026

Last Modified

July 14, 2026

Advisory Details (5)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

SimpleHelp | Release News

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

SimpleHelp Security Update (2026-05)

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

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

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

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 54× in last 7d / 234× 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 729 total refreshes for this CVE.

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

Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 Metasploit module) (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 ↗
  • Metasploitexploit/multi/http/simplehelp_oidc_auth_bypass_rce✓ verified
    First seen Jun 12, 2026

    SimpleHelp OIDC Authentication Bypass Remote Code Execution

    Open source ↗
  • Nucleihttp/cves/2026/CVE-2026-48558.yaml
    First seen Jan 1, 2026

    SimpleHelp <=5.5.15 - OIDC JWT Authentication Bypass

    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 July 14, 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 v4.0 base score of 10.0 (CNA self-assessment; NVD's own analysis pending).
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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