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CVE-2026-48806

Symfony Twig broken access control

9.1 CRITICALEPSS 0.42%
  1. Published14 Jul 2026

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Symfony Twig< 3.27.0

Remediation

Fixed in
Symfony Twig≥ 3.27.0

References

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Frequently asked

Is CVE-2026-48806 being actively exploited?

CVE-2026-48806 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.42%.

How severe is CVE-2026-48806?

CVE-2026-48806 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.42% probability of exploitation.

Which products are affected by CVE-2026-48806?

Affected products include Symfony Twig.

How do I fix CVE-2026-48806?

Upgrade affected software to a fixed version, for example Symfony Twig 3.27.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.