CVE-2026-48558 Details.
SimpleHelp <=5.5.15 - OIDC JWT Authentication Bypass
Atlas does not check this one. Needs requests that change data.
To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check.
About CVE-2026-48558. What It Means.
SimpleHelp <= 5.5.15 and 6.0 pre-release contain an authentication bypass caused by lack of cryptographic signature verification in OIDC tokens, letting remote unauthenticated attackers gain technician sessions, exploit requires OIDC authentication configured.
Affected Product. What Is Hit.
- Vendor
- simple-help
- Product
- Simple Help SimpleHelp
References. Where To Read More.
- https://horizon3.ai/attack-research/disclosures/cve-2026-48558-simplehelp-authentication-bypass-iocs/
- https://simple-help.com/security/simplehelp-security-update-2026-05
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/simplehelp_oidc_auth_bypass_rce.rb
- https://github.com/J4ck3LSyN-Gen2/CVE-2026-48558
- https://nvd.nist.gov/vuln/detail/CVE-2026-48558
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-48558
More CVEs In Simple Help SimpleHelp.
FAQ
Common Questions.
SimpleHelp <=5.5.15 - OIDC JWT Authentication Bypass. SimpleHelp <= 5.5.15 and 6.0 pre-release contain an authentication bypass caused by lack of cryptographic signature verification in OIDC tokens, letting remote unauthenticated attackers gain technician sessions, exploit requires OIDC authentication configured.
No. To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check. The facts about CVE-2026-48558 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
Yes. CVE-2026-48558 is on the CISA Known Exploited Vulnerabilities list, which means attackers have used it against real targets.
Update Simple Help SimpleHelp to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-48558. Atlas does not run a check for it, so nothing here says whether a particular site is affected.