How to Fix CVE-2026-41466: ProjeQtor (Bundle Sibling)
By Sai Kiran Pandrala
Last verified: 2026-05-25
CVE-2026-41466 is a sibling vulnerability in the same vendor advisory as CVE-2026-41462. Applying the patched build named in the primary write-up closes this CVE as well.
| Severity | CVSS 5.1 - Medium |
|---|---|
| Actively exploited? | Not currently in CISA KEV |
| Affected | Same as the bundle - see CVE-2026-41462 |
| Fixed in | Same patched build as CVE-2026-41462 (12.4.4) |
| Type (CWE) | CWE-79: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') |
What's different about CVE-2026-41466?
ProjeQtor versions 7.0 through 12.4.3 contain a stored cross-site scripting vulnerability in the checkValidHtmlText() function within Security.php that fails to properly sanitize user input by only detecting specific patterns while returning unsanitized strings without output encoding. Attackers can inject malicious payloads that bypass the filter using alternative syntax such as img tags with event handlers, which are stored and executed in the browsers of users viewing the affected content.
The technical impact and remediation are identical to the primary CVE in the bundle. The same vendor patch closes both.
How to fix CVE-2026-41466
Apply the patched build per the primary write-up: How to Fix CVE-2026-41462.
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-2026-41466 fixed by the same patch as CVE-2026-41462?
Yes. CVE-2026-41466 ships in the same vendor advisory as CVE-2026-41462. Applying the patched build named in the primary write-up closes both.
What is the CVSS score for CVE-2026-41466?
The CVSS base score is 5.1 (Medium).
Is it being exploited?
It is not currently listed in CISA KEV.
References
- Official vendor advisory: https://www.vulncheck.com/advisories/projeqtor-stored-xss-via-checkvalidhtmltext
- NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2026-41466
- CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- Primary write-up: How to Fix CVE-2026-41462
*Part of the ProjeQtor bundle. Full procedure at CVE-2026-41462.*