CVE-2026-34234
Exploitation reported by one source. First attested on 2026-06-01 by GCVE · kevintel.
- Published2026-05-19
- WeaknessCWE-284 · CWE-78
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
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.
Timeline
dates in UTC- 2026-05-1922:16CVE publishedNVD
- 2026-06-0113:29Listed as exploited by GCVEGCVE
- 2026-06-0113:29Exploitation first reportedGCVE
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-34234?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-34234?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-34234 yet.
Fix
No fix published by the sources we read yet. NVD record
Detection
read 2026-10-23 19:25 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- 1 repository, unverifiedrootdirective-sec/CVE-2026-34234-Lab PoC-in-GitHub
Sources
- NVDCVE recordread 2026-10-23
- GCVEexploitation2026-06-01
- CISA-ADPSSVC decisionpoc2026-05-20
- OpenCVESSVC decisionpoc—
- CNACVSS 3.110read 2026-10-23
- CNAweakness (CWE)CWE-284, CWE-78read 2026-10-23
- FIRST EPSSEPSS score4.5 %2026-10-22
- PoC-in-GitHubproof of concept1read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Published
- 2026-05-19
- Last Modified
- 2026-07-24
- NVD status
- Deferred
Frequently asked questions
What is CVE-2026-34234?
Is CVE-2026-34234 actively exploited?
What is the CVSS score for CVE-2026-34234?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.