CVE-2026-48806: Twig is a template language for PHP

Q: How do I fix CVE-2026-48806?

twig: upgrade to 3.27.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-48806 being exploited?

CVE-2026-48806 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-48806 affect?

CVE-2026-48806 affects twig. Severity is critical (CVSS 9.1). Twig is a template language for PHP. Prior to 3.27.0, ArrayExpression does not guard dynamic mapping keys that are coerced to strings, allowing PHP to invoke __toString() on a Stringable object used as a mapping key without calling SandboxE

Q: How urgent is CVE-2026-48806?

Priority 46/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2026-48806 is a critical-severity flaw (CVSS 9.1) 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. Prior to 3.27.0, ArrayExpression does not guard dynamic mapping keys that are coerced to strings, allowing PHP to invoke __toString() on a Stringable object used as a mapping key without calling SandboxExtension::ensureToStringAllowed(). This issue is fixed in version 3.27.0.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-693, CWE-863
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 22:17 UTCPublished CVE record published
2026-10-24 22:10 UTCUpdated Record last modified

symfony twig UPGRADE

Affected: < 3.27.0

Fixed in: 3.27.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.27.0 (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.

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-2026-48806?

twig: upgrade to 3.27.0. Exact commands for each OS are on this page.

Is CVE-2026-48806 being exploited?

CVE-2026-48806 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-2026-48806 affect?

CVE-2026-48806 affects twig. Severity is critical (CVSS 9.1). Twig is a template language for PHP. Prior to 3.27.0, ArrayExpression does not guard dynamic mapping keys that are coerced to strings, allowing PHP to invoke __toString() on a Stringable object used as a mapping key without calling SandboxE

How urgent is CVE-2026-48806?

Priority 46/100. Critical severity; Remotely exploitable, no login, no user action

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-2026-48807 CRITICAL 9.1 UPGRADE Twig is a template language for PHP
CVE-2026-46640 HIGH 8.8 UPGRADE Twig is a template language for PHP

References

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