Grav: Twig sandbox config exfiltration via grav.offsetGet + dump filter (CVE-2026-44738 bypass)

Exploitation

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

CVSS

6.5 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

• CVE-2026-61450: 5.42% estimated exploitation activity in the next 30 days; percentile 92.71 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
• CVE-2026-61842: 0.44% estimated exploitation activity in the next 30 days; percentile 38.11 (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 The Twig content sandbox replaces config with the redacted SandboxConfig facade and strips Config::get/toArray from the method allowlist (GHSA-j274-39qw-32c9), so editor content can't read config secrets via config. That's bypassable: grav is the raw container, offsetget is allow-listed on it, so grav.offsetGet('config') returns the real Config. The allow-listed filters jsonencode/printr/yamlencode then serialize it at the PHP level, never hitting the sandbox method gate, dumping the whole config tree including every plugins. secret (SMTP creds, API keys, plugin DB creds). Incomplete fix for GHSA-j274-39qw-32c9. security.salt does not leak (it lives outside config). Details The documented path is blocked: config is the SandboxConfig facade (Twig.php:660) and the raw Config/Data method entries are stripped when configaccess is false, so {{ config.get(...) }} returns the default and {{ grav.offsetGet('config').get(...) }} raises SecurityNotAllowedMethodError. The bypass uses…

Published by the source

2 Sep 2026, 21:41 UTC

Last modified by the source

2 Sep 2026, 21:45 UTC

Source last checked

26 Oct 2026, 14:53 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-mc5q-6hpj-rp7j

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-mc5q-6hpj-rp7j

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# Patch Next advisory brief: CVE-2026-61450

Advisory: Grav: Twig sandbox config exfiltration via grav.offsetGet + dump filter (CVE-2026-44738 bypass)
IDs: CVE-2026-61450, GHSA-mc5q-6hpj-rp7j
Record: https://patchnext.com/advisories/cve-2026-61450 (revision 2, 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: Medium (CVSS 6.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: getgrav/grav 2.0.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist getgrav/grav: affected < 2.0.2; fixed in 2.0.2

## 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-mc5q-6hpj-rp7j (OSV record GHSA-mc5q-6hpj-rp7j lists affected ranges: Packagist getgrav/grav >=0 <2.0.2 (fixed))
- Verified: https://github.com/advisories/GHSA-mc5q-6hpj-rp7j (GitHub-reviewed advisory GHSA-mc5q-6hpj-rp7j lists affected ranges: Packagist getgrav/grav >=0 <2.0.2)

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