CVE-2026-4802: Red Hat Enterprise Linux 10 · OS Command Injection
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 8.0 High.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 1.0% chance of exploitation in 30 days – higher than 63% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 11 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10cockpit | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10.0 Extended Update Supportcockpit | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8cockpit | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportcockpit | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.6 Telecommunications Update Servicecockpit | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.6 Update Services for SAP Solutionscockpit | Affected– | Fixed in– |
AI-suggested
Red Hat has released official security updates for Cockpit in Red Hat Enterprise Linux 10 that fix this vulnerability. Users should apply the updated packages as described in the Red Hat advisory RHSA-2026:21390 and follow the instructions in https://access.redhat.com/articles/11258. No additional mitigation is required once the update is applied.
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.
References
- access.redhat.com/errata/RHSA-2026:21390 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:21392 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:21394 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:21395 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:21468 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:21515 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:21516 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:21647 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:21676 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:21700 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-4802 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2451155 (opens in a new tab)
- github.com/cockpit-project/cockpit/blob/e204cd130/pkg/systemd/logsJournal.jsx (opens in a new tab)
- openwall.com/lists/oss-security/2026/05/20/19 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4802.json (opens in a new tab)