CVE-2026-4631

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-07. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 14%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Cockpit's remote login feature passes user-supplied hostnames and usernames from the web interface to the SSH client without validation or sanitization. An attacker with network access to the Cockpit web service can craft a single HTTP request to the login endpoint that injects malicious SSH options or shell commands, achieving code execution on the Cockpit host without valid credentials. The injection occurs during the authentication flow before any credential verification takes place, meaning no login is required to exploit the vulnerability.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
96.2%
KEV
Not listed

Published

April 7, 2026

Last Modified

July 15, 2026

Advisory Details (7)

Auto-updated Jul 16, 2026
Patch available. Sources: redhat.
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2026:7383
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.6 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:7382
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2026:7381
generic Patch Available

oss-security - CVE-2026-4631 [cockpit] Unauthenticated remote code execution due to SSH command-line argument injection

http://www.openwall.com/lists/oss-security/2026/04/10/5
redhat Patch Available

2450246 – (CVE-2026-4631) CVE-2026-4631 cockpit: Cockpit: Unauthenticated remote code execution due to SSH command-line argument injection

https://bugzilla.redhat.com/show_bug.cgi?id=2450246
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-4631
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:7384

Vendor Advisories for CVE-2026-4631(4)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatcockpit-0:334.1-3.el10_02026-04-10redhat
redhatcockpit-0:344-2.el9_72026-04-10redhat
redhatcockpit-0:334.2-2.el9_62026-04-10redhat
redhatcockpit-0:344-3.el10_12026-04-10redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 35× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 126 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:00 UTCEPSS rescore
  4. 2026-07-15 02:00 UTCEPSS rescore
  5. 2026-07-13 22:31 UTCEPSS rescore
  6. 2026-07-12 05:46 UTCEPSS rescore
  7. 2026-07-11 08:27 UTCEPSS rescore
  8. 2026-07-11 08:27 UTCEPSS rescore
  9. 2026-07-09 19:10 UTCEPSS rescore
  10. 2026-07-08 15:16 UTCEPSS rescore
  11. 2026-07-07 13:46 UTCEPSS rescore
  12. 2026-07-06 16:27 UTCEPSS rescore
  13. 2026-07-05 02:30 UTCEPSS rescore
  14. 2026-07-04 06:31 UTCEPSS rescore
  15. 2026-07-01 15:07 UTCEPSS rescore
  16. 2026-06-30 23:22 UTCEPSS rescore
  17. 2026-06-29 14:06 UTCEPSS rescore
  18. 2026-06-29 14:06 UTCEPSS rescore
  19. 2026-06-28 04:56 UTCEPSS rescore
  20. 2026-06-28 04:56 UTCEPSS rescore
  21. 2026-06-27 03:08 UTCEPSS rescore
  22. 2026-06-25 13:49 UTCEPSS rescore
  23. 2026-06-24 14:05 UTCEPSS rescore
  24. 2026-06-23 21:33 UTCEPSS rescore
  25. 2026-06-23 21:33 UTCEPSS rescore
Show 75 more
  1. 2026-06-22 14:25 UTCEPSS rescore
  2. 2026-06-22 14:25 UTCEPSS rescore
  3. 2026-06-21 01:59 UTCEPSS rescore
  4. 2026-06-21 01:59 UTCEPSS rescore
  5. 2026-06-19 19:26 UTCEPSS rescore
  6. 2026-06-19 19:26 UTCEPSS rescore
  7. 2026-06-18 17:52 UTCEPSS rescore
  8. 2026-06-18 17:52 UTCEPSS rescore
  9. 2026-06-17 17:53 UTCEPSS rescore
  10. 2026-06-16 17:53 UTCEPSS rescore
  11. 2026-06-15 17:49 UTCEPSS rescore
  12. 2026-06-15 17:49 UTCEPSS rescore
  13. 2026-06-14 23:18 UTCEPSS rescore
  14. 2026-06-13 23:00 UTCEPSS rescore
  15. 2026-06-12 23:12 UTCEPSS rescore
  16. 2026-06-12 23:12 UTCEPSS rescore
  17. 2026-06-12 04:41 UTCEG score recompute
  18. 2026-06-12 04:41 UTCVendor advisory
  19. 2026-06-12 04:41 UTCGHSA enrichment
  20. 2026-06-12 01:01 UTCEG score recompute
  21. 2026-06-12 01:01 UTCVendor advisory
  22. 2026-06-12 01:01 UTCGHSA enrichment
  23. 2026-06-11 21:21 UTCEG score recompute
  24. 2026-06-11 21:21 UTCVendor advisory
  25. 2026-06-11 21:21 UTCGHSA enrichment
  26. 2026-06-11 14:00 UTCEPSS rescore
  27. 2026-06-10 22:19 UTCEPSS rescore
  28. 2026-06-10 20:14 UTCEG score recompute
  29. 2026-06-10 20:14 UTCVendor advisory
  30. 2026-06-10 20:14 UTCGHSA enrichment
  31. 2026-06-10 16:34 UTCEG score recompute
  32. 2026-06-10 16:34 UTCVendor advisory
  33. 2026-06-10 16:34 UTCGHSA enrichment
  34. 2026-06-10 13:22 UTCEPSS rescore
  35. 2026-06-10 12:53 UTCEG score recompute
  36. 2026-06-10 12:53 UTCVendor advisory
  37. 2026-06-10 12:53 UTCGHSA enrichment
  38. 2026-06-10 08:36 UTCEG score recompute
  39. 2026-06-10 08:36 UTCVendor advisory
  40. 2026-06-10 08:36 UTCGHSA enrichment
  41. 2026-06-10 04:56 UTCEG score recompute
  42. 2026-06-10 04:56 UTCVendor advisory
  43. 2026-06-10 04:56 UTCGHSA enrichment
  44. 2026-06-10 01:09 UTCEG score recompute
  45. 2026-06-10 01:09 UTCVendor advisory
  46. 2026-06-10 01:09 UTCGHSA enrichment
  47. 2026-06-09 17:32 UTCEG score recompute
  48. 2026-06-09 17:32 UTCVendor advisory
  49. 2026-06-09 17:32 UTCGHSA enrichment
  50. 2026-06-09 13:50 UTCEG score recompute
  51. 2026-06-09 13:50 UTCVendor advisory
  52. 2026-06-09 13:50 UTCGHSA enrichment
  53. 2026-06-08 14:17 UTCEPSS rescore
  54. 2026-06-08 14:17 UTCEPSS rescore
  55. 2026-06-08 12:26 UTCEG score recompute
  56. 2026-06-08 12:26 UTCVendor advisory
  57. 2026-06-08 12:26 UTCGHSA enrichment
  58. 2026-06-08 08:41 UTCEG score recompute
  59. 2026-06-08 08:41 UTCVendor advisory
  60. 2026-06-08 08:41 UTCGHSA enrichment
  61. 2026-06-08 05:00 UTCEG score recompute
  62. 2026-06-08 05:00 UTCVendor advisory
  63. 2026-06-08 05:00 UTCGHSA enrichment
  64. 2026-06-08 01:21 UTCEG score recompute
  65. 2026-06-08 01:21 UTCVendor advisory
  66. 2026-06-08 01:21 UTCGHSA enrichment
  67. 2026-06-07 21:41 UTCEG score recompute
  68. 2026-06-07 21:41 UTCVendor advisory
  69. 2026-06-07 21:41 UTCGHSA enrichment
  70. 2026-06-07 17:58 UTCEG score recompute
  71. 2026-06-07 17:58 UTCVendor advisory
  72. 2026-06-07 17:58 UTCGHSA enrichment
  73. 2026-06-07 14:16 UTCEG score recompute
  74. 2026-06-07 14:16 UTCVendor advisory
  75. 2026-06-07 14:16 UTCGHSA enrichment

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-52572
    First seen May 21, 2026

    Cockpit 359 - RCE

    Open source ↗
  • Nucleihttp/cves/2026/CVE-2026-4631.yaml
    First seen Jan 1, 2026

    Cockpit Web Console < 360 - Remote Code Execution

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-4631?
CVE-2026-4631 is a critical vulnerability published on April 7, 2026. Cockpit's remote login feature passes user-supplied hostnames and usernames from the web interface to the SSH client without validation or sanitization. An attacker with network access to the Cockpit web service can craft a single HTTP request to the login endpoint that injects malicious SSH…
When was CVE-2026-4631 disclosed?
CVE-2026-4631 was first published in the National Vulnerability Database on April 7, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-4631 actively exploited?
CVE-2026-4631 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 96.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-4631?
CVE-2026-4631 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-4631?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-4631, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-4631

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