CVE-2026-46639: Twig is a template language for PHP

Routine

MEDIUM 6.5UPGRADE

CVE-2026-46639 is a medium-severity flaw (CVSS 6.5) affecting twig. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Twig is a template language for PHP. From 3.24.0 until 3.26.0, object-destructuring assignment compiles CoreExtension::getAttribute() with the sandbox argument hardcoded to false, disabling property and method policy checks and allowing an attacker with write access to a sandboxed Twig template to read public properties or invoke public getters on objects passed to the template engine. This issue is fixed in version 3.26.0.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-693
Published	2026-07-14
Last modified	2026-10-24

Publisher (CNA): GitHub, Inc. · Vendor: symfony

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-14 22:16 UTCPublished CVE record published
2026-10-24 22:10 UTCUpdated Record last modified

symfony twig UPGRADE

Affected: >= 3.24.0 and < 3.26.0

Fixed in: 3.26.0

Safe to downgrade to: a release before 3.24.0

1. Check installed version

apt-cache policy twig || rpm -q twig || twig --version

2. UPGRADE to 3.26.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade twig

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade twig

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.24.0 (Debian / Ubuntu)

apt-cache madison twig sudo apt install twig=<VERSION_BEFORE_3.24.0> sudo apt-mark hold twig

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list twig sudo dnf downgrade twig-<VERSION_BEFORE_3.24.0> sudo dnf versionlock add twig

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-46639?

twig: upgrade to 3.26.0. Exact commands for each OS are on this page.

Is CVE-2026-46639 being exploited?

CVE-2026-46639 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-46639 affect?

CVE-2026-46639 affects twig. Severity is medium (CVSS 6.5). Twig is a template language for PHP. From 3.24.0 until 3.26.0, object-destructuring assignment compiles CoreExtension::getAttribute() with the sandbox argument hardcoded to false, disabling property and method policy checks and allowing an

How urgent is CVE-2026-46639?

Priority 31/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-46633 CRITICAL 9.8 UPGRADE Twig is a template language for PHP
CVE-2026-46634 CRITICAL 9.8 UPGRADE Twig is a template language for PHP
CVE-2026-48805 CRITICAL 9.1 UPGRADE Twig is a template language for PHP
CVE-2026-48806 CRITICAL 9.1 UPGRADE Twig is a template language for PHP
CVE-2026-48807 CRITICAL 9.1 UPGRADE Twig is a template language for PHP

References

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