VulnSocial

CVE-2026-46637Disclosure(symfony / twig)

LOWCVSS 5.4 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Twig is a template language for PHP. Prior to 3.26.0, several filters in twig/markdown-extra and twig/cssinliner-extra are registered with is_safe => [all], causing Twig to treat plain text or HTML output as safe in HTML, JavaScript, CSS, URL, and other contexts where the output is not properly escaped. This issue is fixed in version 3.26.0.

symfony CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Patch / fix
Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-116CWE-79

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • twig

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Vendors
symfony
Products
twig

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-05-20: 1Technical Details · 2026-05-20: 105-20
Signal classification1 categories
Disclosure
1100.0%
Referenced assets1 URL
Full discourse1 post
  • Symfony@symfony
    Disclosure

    🔐 CVE-2026-46637: HTML-output filters in twig/* extras incorrectly declared `is_safe => ['all']` ➡️ https://symfony.com/blog/cve-2026-46637-html-output-filters-in-twig-extras-incorrectly-declared-is-safe-all

    Post summary

    The tweet announces the discovery of CVE-2026-46637 in Symfony Twig extras, describing an issue with incorrectly marked safe HTML filters, but provides no proof‑of‑concept, exploit code, active exploitation evidence, or patch details.

    0301002.5K
    45.2K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appsymfonytwig---

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