Grav: config_denied_paths default list omits system, exposing real secrets (e.g. system.cache.redis.password) via the Twig sandbox when config_access is enabled

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2026-76846: 0.30% estimated exploitation activity in the next 30 days; percentile 23.35 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary system/config/security.yaml's default twigsandbox.configdeniedpaths list (plugins, streams, security, backups, scheduler) omits the system prefix. When an operator enables the documented, non-default twigcontent.configaccess: true setting (intended to safely expose low-sensitivity values like site.title to editor-authored Twig content), any real secret stored under system. , for example system.cache.redis.password , is also exposed, both via config.get(...) and via config.toArray(), to any user with page-edit permission. This is a follow-up gap in the fix for GHSA-j274-39qw-32c9 (config.toArray() secret exfiltration): that fix correctly introduced a SandboxConfig facade with a denylist, but the shipped default denylist is incomplete. Environment used to verify - Grav commit at HEAD of the default branch, GRAVVERSION 2.0.15 - PHP 8.3.6 with curl, zip, dom, gd extensions installed - Full composer install --no-dev run against the real repository (no mocked dependencies) so the…

Published by the source

17 Sep 2026, 20:27 UTC

Last modified by the source

17 Sep 2026, 20:45 UTC

Source last checked

26 Oct 2026, 14:53 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-xjw5-q542-3vmr

2. Revision 2 · amended · 25 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-xjw5-q542-3vmr

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# Patch Next advisory brief: CVE-2026-76846

Advisory: Grav: config_denied_paths default list omits `system`, exposing real secrets (e.g. system.cache.redis.password) via the Twig sandbox when config_access is enabled
IDs: CVE-2026-76846, GHSA-xjw5-q542-3vmr
Record: https://patchnext.com/advisories/cve-2026-76846 (revision 3, source checked 26 Oct 2026, 14:53 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: getgrav/grav 2.0.16. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist getgrav/grav: affected <= 2.0.15; fixed in 2.0.16

## Suggested inspection (read-only)
- Packagist getgrav/grav: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on getgrav/grav.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-xjw5-q542-3vmr (OSV record GHSA-xjw5-q542-3vmr lists affected ranges: Packagist getgrav/grav >=0 <2.0.16 (fixed))
- Verified: https://github.com/advisories/GHSA-xjw5-q542-3vmr (GitHub-reviewed advisory GHSA-xjw5-q542-3vmr lists affected ranges: Packagist getgrav/grav >=0 <=2.0.15)

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