# CVE-2026-48808: Twig: Sandbox property allowlist bypass via the `column` filter under `SourcePolicyInterface`

> A flaw in Twig's column filter bypasses sandbox property restrictions, allowing template authors to read unauthorized public or magic properties.

- **Severity:** Medium 6.0 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 14 Jul 2026
- **Updated:** 15 Jul 2026
- **Also known as:** DEBIAN-CVE-2026-48808, GHSA-h8vq-8gpg-mhcg, UBUNTU-CVE-2026-48808

## What is CVE-2026-48808?

CVE-2026-48808 is a medium-severity vulnerability in twigphp Twig, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Twig is a template language for PHP. Prior to 3.27.0, the column filter passes the active sandbox state as a boolean but does not forward the current Source to SandboxExtension::checkPropertyAllowed(), so SourcePolicyInterface decisions are lost and a template author can read public or magic properties not allowed by the sandbox policy. This issue is fixed in version 3.27.0.

Weakness: CWE-863 (Incorrect Authorization), CWE-693 (Protection Mechanism Failure)

## Which versions are affected by CVE-2026-48808?

2 open source packages ship an affected version, including twig/twig. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `twig/twig` | Packagist | All versions | 3.27.0 |
| `twig/twig` | Packagist | All versions | 3.27.0 |

Products: Symfony Twig.

## How do I fix CVE-2026-48808?

Upgrade twig/twig to 3.27.0 or later.

## Is CVE-2026-48808 being exploited?

There is no known exploitation of CVE-2026-48808 in the wild and no public exploit code.

## Other vulnerabilities in twigphp Twig

- [CVE-2018-13818](https://insights.sbomify.com/CVE-2018-13818/): Code injection in n/a (critical 9.8)
- [CVE-2026-46633](https://insights.sbomify.com/CVE-2026-46633/): Twig: PHP code injection via `{% use %}` template name (high 8.7)
- [CVE-2026-46640](https://insights.sbomify.com/CVE-2026-46640/): Twig: Arbitrary PHP code execution via `_self.(<string>)` macro-reference compilation (high 8.7)
- [CVE-2026-24425](https://insights.sbomify.com/CVE-2026-24425/): Twig 2.16.x & 3.9.0-3.25.x Sandbox Bypass via SourcePolicyInterface (high 8.7)
- [CVE-2024-45411](https://insights.sbomify.com/CVE-2024-45411/): Twig has a possible sandbox bypass (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-48808 and fix it if it is affected.

What it is: CVE-2026-48808 is a medium-severity vulnerability in twigphp Twig, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-48808 in the wild and no public exploit code.

Affected packages and fixed versions:
- twig/twig (Packagist): affected all versions; fixed in 3.27.0
- twig/twig (Packagist): affected all versions; fixed in 3.27.0

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-48808/ (Markdown: https://insights.sbomify.com/CVE-2026-48808/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-48808
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-48808
- OSV: https://osv.dev/vulnerability/CVE-2026-48808

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-48808/
Summaries are generated and may contain mistakes; the official description above is the record.