CVE-2026-34234

CRITICALNVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 10.0 under NVD CVSS v3. EPSS exploit probability: 0.8%, top 47% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
10.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 10.0Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

CtrlPanel is open-source billing software for hosting providers. In versions 1.1.1 and prior, the web-based installer (public/installer/index.php) is vulnerable to unauthenticated Remote Code Execution (RCE) because it performs the install.lock check only after including and executing form handler files, leaving installer endpoints reachable on already-installed instances. The handlers also pass unsanitized user input directly into shell commands, allowing an attacker to submit crafted requests that execute arbitrary commands on the server. The vulnerability stems from two combined weaknesses: (1) premature form handler execution before the lock file gate, and (2) unsafe use of user input in shell command construction. This issue is reported to be actively exploited in the wild. The issue has been fixed in version 1.2.0.

CVSS v3
10.0
EG Score
10.0(medium)
EPSS
53.0%
KEV
Not listed

Published

May 19, 2026

Last Modified

May 20, 2026

Advisory Details (2)

Auto-updated Jul 15, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_release.
github Patch Available🟡 PoC Available

Unauthenticated RCE via Installer Accessible After Installation and Unsanitized Shell Arguments · Advisory · Ctrlpanel-gg/panel · GitHub

https://github.com/Ctrlpanel-gg/panel/security/advisories/GHSA-jmhr-q9q5-fqwh
github_release Patch Available

1.2.0

Patch available: Ctrlpanel-gg/panel 1.2.0

https://github.com/Ctrlpanel-gg/panel/releases/tag/1.2.0

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 66× 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 193 total refreshes for this CVE.

  1. 2026-07-15 02:00 UTCEPSS rescore
  2. 2026-07-13 22:30 UTCEPSS rescore
  3. 2026-07-13 06:13 UTCEPSS rescore
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  18. 2026-06-29 20:35 UTCEG score recompute
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  1. 2026-06-28 04:56 UTCEPSS rescore
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  26. 2026-06-18 03:49 UTCEG score recompute
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  40. 2026-06-15 17:49 UTCEPSS rescore
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  44. 2026-06-14 23:18 UTCEPSS rescore
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  57. 2026-06-12 23:12 UTCEPSS rescore
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  59. 2026-06-12 19:46 UTCEG score recompute
  60. 2026-06-12 15:56 UTCEG score recompute
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  72. 2026-06-10 22:18 UTCEPSS rescore
  73. 2026-06-10 21:23 UTCEG score recompute
  74. 2026-06-10 17:33 UTCEG score recompute
  75. 2026-06-10 13:43 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-34234?
CVE-2026-34234 is a critical vulnerability published on May 19, 2026. CtrlPanel is open-source billing software for hosting providers. In versions 1.1.1 and prior, the web-based installer (public/installer/index.php) is vulnerable to unauthenticated Remote Code Execution (RCE) because it performs the install.lock check only after including and executing form handler…
When was CVE-2026-34234 disclosed?
CVE-2026-34234 was first published in the National Vulnerability Database on May 19, 2026, with the most recent update on May 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34234 actively exploited?
CVE-2026-34234 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 53.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-34234?
CVE-2026-34234 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-34234?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34234, 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

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