CVE-2026-49049
HighExploitedThe Helix3 plugin for Joomla exposes an ajax handler task, that allows unauthenticated attackers to delete arbitrary files, write arbitrary JSON files and update template parameters.
Published Jun 29, 2026 · Updated Aug 12, 2026
Key Facts
Patch immediately- CVE-2026-49049 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Helix3 (Ollyo), Helix3 extension for Joomla.
- It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV, ENISA EUVD since Jul 10, 2026. No public exploit code is known.
- EPSS estimates a 1.0% probability of exploitation in the next 30 days.
- Fixed versions are available, including Helix3 3.1.1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS (30-day exploit likelihood)
1.0%
Higher than 61.9% of all scored CVEs
Exploited in the wild
Yes
3 catalog listings
Public exploit code
None known
Get the full CVE-2026-49049 brief as a PDF
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Description
The Helix3 plugin for Joomla exposes an ajax handler task, that allows unauthenticated attackers to delete arbitrary files, write arbitrary JSON files and update template parameters.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Aug 11, 2026 | n/a | Not reported |
| CIRCL KEV | Jul 10, 2026 | n/a | Not reported |
| ENISA EUVD | Jul 10, 2026 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Helix3Ollyo | See advisory | 3.1.1 |
| Helix3 extension for Joomla | >= 1.0-3.1.1 | n/a |
Patched Releases
Helix3
3.1.1
Timeline
Publicly disclosed
Jun 29, 2026
Added to CIRCL KEV
Jul 10, 2026
Added to ENISA EUVD
Jul 10, 2026
Added to Industry KEV feed
Aug 11, 2026
Last updated
Aug 12, 2026
Weakness Type
- CWE-284 Improper Access Control
References
FAQ
Common Questions.
The Helix3 plugin for Joomla exposes an ajax handler task, that allows unauthenticated attackers to delete arbitrary files, write arbitrary JSON files and update template parameters.
Affected: Helix3 (Ollyo); Helix3 extension for Joomla versions >= 1.0-3.1.1. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV, ENISA EUVD since Jul 10, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Helix3 3.1.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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