What is CVE-2026-48808?

CVE-2026-48808 is a high-severity vulnerability in Symfony Twig, classified under Protection Mechanism Failure. CVSS score: 7.5/10. Published 2026-07-14.

How severe is CVE-2026-48808?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Symfony Twig

CVE-2026-48808

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.

Published 2026-07-14 · last modified 2026-07-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (33.9th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Symfony Twig
Twigphp Twig — versions < 3.27.0

Weakness classification (CWE)

References

github.com/twigphp/Twig/security/advisories/GHSA-h8vq-8gpg-mhcg (Vendor Advisory)
github.com/twigphp/Twig/commit/09c6706407ed7b1cb2d7d1408004f811e47e0424 (Patch)
github.com/twigphp/Twig/releases/tag/v3.27.0 (Release Notes)

Frequently asked questions

What is CVE-2026-48808?: CVE-2026-48808 is a high-severity vulnerability in Symfony Twig, classified under Protection Mechanism Failure. CVSS score: 7.5/10. Published 2026-07-14.
How severe is CVE-2026-48808?: High severity. CVSS v3 base score is 7.5 out of 10.