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 — 3 sources updated this weekExploited in the wild
10.0EG
EchelonGraph verdictMitigate nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 5.7%CVSS: 10.0Exploit: cisa kev · ssvc active · Metasploit · public exploitExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

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
10.0CRITICALhigh confidence
EG Risk
100
EG Risk 100/100CISA SSVC

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%
CISA SSVC: Attend at low mission impact; Act at medium or high.
Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that sooner than your standard update timelines at low mission impact and as soon as possible at medium or high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
EPSS PROB
5.7%
EPSS %ILE
92nd
KEV
⚠ Exploited

CISA SSVCAttend at low mission impact; Act at medium or high.

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that sooner than your standard update timelines at low mission impact and as soon as possible at medium or high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

June 12, 2026

Last Modified

October 7, 2026

Advisory Details (5)

Auto-updated Oct 7, 2026
⚠️ Active exploitation confirmed. Fix referenced — no release confirmed yet. Sources: cisa.
cisa🔴 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

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

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 54× in last 7d / 230× 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 889 total refreshes for this CVE.

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

Publicly available exploits

(3 references)

Public exploit code is referenced for this CVE (1 Metasploit module, 1 GitHub PoC, 1 Nuclei detection template). Defenders should treat patch urgency accordingly.

  • Metasploitexploit/multi/http/simplehelp_oidc_auth_bypass_rce✓ verified

    SimpleHelp OIDC Authentication Bypass Remote Code Execution

    Open source ↗
  • GitHub PoCJ4ck3LSyN-Gen2/CVE-2026-48558

    SimpleHelp OIDC Authentication Bypass PoC

    Open source ↗
  • Nucleihttp/cves/2026/CVE-2026-48558.yaml

    SimpleHelp <=5.5.15 - OIDC JWT Authentication Bypass

    Open source ↗

Related CVEs(same CWE)

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 on June 12, 2026, with the most recent update on October 7, 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 attention. A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
What is the CVSS score of CVE-2026-48558?
CVE-2026-48558 has a CVSS base score of 10.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
Which products are affected by CVE-2026-48558?
CVE-2026-48558 affects SimpleHelp SimpleHelp.
How do I remediate CVE-2026-48558?
A fix for CVE-2026-48558 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-48558 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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