CVE-2026-46627 Twig: Sandbox resource exhaustion via unbounded `for` / `range()`
High 7.1
Published
Updated
Check this codebase for CVE-2026-46627 and fix it if it is affected.
What it is: CVE-2026-46627 is a high-severity vulnerability in twigphp Twig, published on 14 Jul 2026.
Exploitation: There is no known exploitation of CVE-2026-46627 in the wild and no public exploit code.
Affected product: twigphp Twig. No package-level version data is available, so check the vendor advisory linked from the reference page.
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-2026-46627/ (Markdown: https://insights.sbomify.com/CVE-2026-46627/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-46627?
CVE-2026-46627 is a high-severity vulnerability in twigphp Twig, published on 14 Jul 2026.
Official description
Twig is a template language for PHP. Prior to 3.26.0, the Twig sandbox does not prevent a template from consuming CPU, memory, or wall-clock time, even under the strictest allow-list, allowing untrusted templates to cause resource exhaustion. This issue is addressed in version 3.26.0 by documenting that the sandbox does not protect against resource exhaustion.
Weakness: CWE-400
Which versions are affected by CVE-2026-46627?
It affects 1 product.
Products include Symfony Twig.
How do I fix CVE-2026-46627?
Upgrade to a fixed version.
Is CVE-2026-46627 being exploited?
There is no known exploitation of CVE-2026-46627 in the wild and no public exploit code.
Other vulnerabilities in twigphp Twig
- CVE-2018-13818 Code injection in n/a
- CVE-2026-46633 Twig: PHP code injection via `{% use %}` template name
- CVE-2026-46640 Twig: Arbitrary PHP code execution via `_self.(<string>)` macro-reference compilation
- CVE-2026-24425 Twig 2.16.x & 3.9.0-3.25.x Sandbox Bypass via SourcePolicyInterface
- CVE-2024-45411 Twig has a possible sandbox bypass
Sources
Also known as DEBIAN-CVE-2026-46627, GHSA-923g-j88x-j34q, UBUNTU-CVE-2026-46627.