CVE-2026-26274 — october/october
MEDIUMCVE-2026-26274 is a medium-severity (CVSS 6.6) CWE-184 vulnerability in october/october. A fix is available for october/october — see the affected versions and patch details below.
October CMS has Safe Mode Bypass via Twig Database Write Operations
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-26274.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2026-26274 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 378,156 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
october/october🐘october/octoberReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
A vulnerability was identified in the Twig sandbox security policy that allowed database write operations when cms.safe_mode is enabled. Backend users with Developer permissions could use Twig template markup to execute insert, update, and delete operations on any database table through the query builder, which is included in the sandbox allow-list.
Impact
- Arbitrary database writes including modification or deletion of any table
- Requires authenticated backend access with Developer permissions
- Only relevant when
cms.safe_modeis enabled (otherwise direct PHP injection is already possible)
Patches
The vulnerability has been patched in v3.7.14 and v4.1.10. Write operations such as insert, update, delete, and truncate are now blocked on query builder and model objects within the Twig sandbox. All users are encouraged to upgrade to the latest patched version.
Workarounds
If upgrading immediately is not possible:
- Restrict Developer tool access to fully trusted administrators only
Reporter
- Reported by Chris Alupului
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | october/october | all versions | 3.7.14composer require october/october:^3.7.14 |
| 🐘Packagist | october/october | ≥ 4.0.0&&< 4.1.10 | 4.1.10composer require october/october:^4.1.10 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for october/october, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update october/october to 3.7.14 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-26274 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2026-26274 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2026-26274. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2026-26274 in your dependencies?
O3 Security finds CVE-2026-26274 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.