What is CVE-2026-47730?

CVE-2026-47730 is a medium-severity vulnerability in Symfony Twig, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-07-14.

How severe is CVE-2026-47730?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Symfony Twig

CVE-2026-47730

Twig is a template language for PHP. From 3.0.0 until 3.26.0, Twig\Profiler\Dumper\HtmlDumper writes Profile::getTemplate() and Profile::getName() into HTML output without escaping, allowing attacker-controlled template or profile names to inject arbitrary HTML when a browser renders the profiler dump. This issue is fixed in version 3.26.0.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-07-14 · last modified 2026-07-21.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (21.0th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Symfony Twig
Twigphp Twig — versions >= 3.0.0, < 3.26.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/twigphp/Twig/security/advisories/GHSA-2g2g-8p8h-fgwm (Vendor Advisory)
github.com/twigphp/Twig/commit/a5f6e8793e603ef34fa86aed2a72f9fbe0b43745 (Patch)
github.com/twigphp/Twig/releases/tag/v3.26.0 (Release Notes)

Frequently asked questions

What is CVE-2026-47730?: CVE-2026-47730 is a medium-severity vulnerability in Symfony Twig, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-07-14.
How severe is CVE-2026-47730?: Medium severity. CVSS v3 base score is 5.4 out of 10.