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CVE-2026-46637— Twig: HTML-output filters in twig/* extras incorrectly declared `is_safe => ['all']`

Quick assessment

Affected
twigphp Twig
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

twigphp Twig是twigphp的PHP模板引擎。 twigphp Twig 3.26.0之前版本存在输出处理不当漏洞，该漏洞源于过滤器注册为is_safe => [all]，可能导致将纯文本或HTML输出视为安全而未正确转义。

AI Predicted 5.9 Difficulty: Easy EPSS 0.30% · P22

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 3

VendorProduct Version RangeStatus
twig cssinliner-extra < 3.26.0 affected
twig markdown-extra < 3.26.0 affected
twigphp Twig < 3.26.0 affected
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I. Basic Information for CVE-2026-46637

Vulnerability Information
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Vulnerability Title
Twig: HTML-output filters in twig/* extras incorrectly declared `is_safe => ['all']`
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对输出编码和转义不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
twigphp Twig 输出处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
twigphp Twig是twigphp的PHP模板引擎。 twigphp Twig 3.26.0之前版本存在输出处理不当漏洞，该漏洞源于过滤器注册为is_safe => [all]，可能导致将纯文本或HTML输出视为安全而未正确转义。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
twigphp Twig < 3.26.0 -
twig cssinliner-extra < 3.26.0 -
twig markdown-extra < 3.26.0 -

II. Public POCs for CVE-2026-46637

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III. Intelligence Information for CVE-2026-46637

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Patches & Fixes for CVE-2026-46637 (2)

Vendor Advisories for CVE-2026-46637 (1)

Vendor Pages for CVE-2026-46637 (1)

Same Patch Batch · twigphp · 2026-07-14 · 17 CVEs total

CVE-2026-46634 7.7 HIGH Twig: `template_from_string()` escapes a SourcePolicy-driven sandbox via synthesized templ
CVE-2026-47730 Twig: XSS in profiler HtmlDumper via unescaped template and profile names
CVE-2026-47732 Twig Sandbox: multiple `__toString()` policy bypasses via unguarded string coercion points
CVE-2026-48806 Twig: Sandbox `__toString()` policy bypass via dynamic mapping keys
CVE-2026-48805 Twig: Sandbox state regression in deprecated internal wrappers in `src/Resources/core.php`
CVE-2026-48808 Twig: Sandbox property allowlist bypass via the `column` filter under `SourcePolicyInterfa
CVE-2026-48807 Twig: Sandbox `__toString()` policy bypass via `Traversable` in `join` and `replace` filte
CVE-2026-49981 Twig: Sandbox filter, tag and function allow-list bypass when sandbox state changes betwee
CVE-2026-46635 Twig: Sandbox property allowlist bypass via the `column` filter (array_column on objects)
CVE-2026-46638 Twig: `{% sandbox %}{% include %}` skips checkSecurity() on cached templates (incomplete f
CVE-2026-46628 Twig: The `spaceless` filter implicitly marks its output as safe
CVE-2026-46640 Twig: Arbitrary PHP code execution via `_self.(<string>)` macro-reference compilation
CVE-2026-46639 Twig: Sandbox property and method bypass via object-destructuring assignment
CVE-2026-46627 Twig: Sandbox resource exhaustion via unbounded `for` / `range()`
CVE-2026-46633 Twig: PHP code injection via `{% use %}` template name
CVE-2026-46629 Twig: Unbounded formatter memoisation in twig/intl-extra keyed on template-controlled argu

IV. Related Vulnerabilities

Same product: Twig
Same vendor: twigphp
Same weakness: CWE-116

V. Comments for CVE-2026-46637

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