CVE-2026-48558 CISA KEV · Actively exploitedSuited to automated attack · CISA

SimpleHelp Authentication Bypass via Missing OIDC JWT Signature Verification

CVSS score

9.5

EPSS probability

%5.7

Risk score

1.1

Published

4 mo ago

Vulnerability Timeline (Change History)

CVE-2026-48558 historical changes made to the vulnerability by NVD, CISA and MITRE:

Date	Actor / Source	Action / Description	Type	Previous value	New value
07.10.2026	nvd@nist.gov	Initial Analysis & CVSS Vector Assignment	CVSS V3.1	—	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
29.06.2026	CISA Coordinator	Added to KEV Catalog (Active Exploitation)	SSVC / KEV	exploitation: none	exploitation: active
12.06.2026	MITRE / NVD	New CVE Record Received & Ingested	CVE Created	—	CVE-2026-48558

7.5

Patch status unknown Public Exploits:2EPSS %971 y ago

9.9

Workaround Public Exploits:1EPSS %671 y ago

7.2

Workaround Public Exploits:1EPSS %651 y ago

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.daybreach.dev/api/v1/intel/cves/CVE-2026-48558"