How to Fix CVE-2026-34415: xerteonlinetoolkits (Bundle Sibling)
By Sai Kiran Pandrala
Last verified: 2026-05-25
CVE-2026-34415 is a sibling vulnerability in the same vendor advisory as CVE-2026-34413. Applying the patched build named in the primary write-up closes this CVE as well.
| Severity | CVSS 9.3 - Critical |
|---|---|
| Actively exploited? | Not currently in CISA KEV |
| Affected | Same as the bundle - see CVE-2026-34413 |
| Fixed in | Same patched build as CVE-2026-34413 (See vendor advisory) |
| Type (CWE) | CWE-184: CWE-184 Incomplete List of Disallowed Inputs |
What's different about CVE-2026-34415?
Xerte Online Toolkits versions 3.15 and earlier contain an incomplete input validation vulnerability in the elFinder connector endpoint that fails to block PHP-executable extensions .php4 due to an incorrect regex pattern. Unauthenticated attackers can exploit this flaw combined with authentication bypass and path traversal vulnerabilities to upload malicious PHP code, rename it with a .php4 extension, and execute arbitrary operating system commands on the server.
The technical impact and remediation are identical to the primary CVE in the bundle. The same vendor patch closes both.
How to fix CVE-2026-34415
Apply the patched build per the primary write-up: How to Fix CVE-2026-34413.
The patch installation procedure, verification commands, and interim mitigations are documented there. Reusing one runbook keeps the rollout consistent across the bundle.
Frequently asked questions
Is CVE-2026-34415 fixed by the same patch as CVE-2026-34413?
Yes. CVE-2026-34415 ships in the same vendor advisory as CVE-2026-34413. Applying the patched build named in the primary write-up closes both.
What is the CVSS score for CVE-2026-34415?
The CVSS base score is 9.3 (Critical).
Is it being exploited?
It is not currently listed in CISA KEV.
References
- Official vendor advisory: https://github.com/thexerteproject/xerteonlinetoolkits/commit/02661be88cc369325ea01b508086bde7fbfec805
- NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2026-34415
- CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- Primary write-up: How to Fix CVE-2026-34413
*Part of the xerteonlinetoolkits bundle. Full procedure at CVE-2026-34413.*