CVE-2026-46634Network attack vector

Command execution via synthesized-name sandbox bypass

Published Jul 14, 2026 · Updated Jul 14, 2026

Sandbox bypass in Twig 3.9.0 through versions before 3.26.0 allows remote authenticated users to execute commands through inner templates. Environment::createTemplate() assigns a synthesized string_template hash name, causing a path-based SourcePolicyInterface to treat the inner template as unsandboxed and make checkSecurity() a no-op. Exploitation requires selective SourcePolicyInterface sandboxing, StringLoaderExtension, and permission to call template_from_string and include; successful templates can read secrets or invoke system commands.

CVSS severity7.7
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox bypass in Twig 3.9.0 through versions before 3.26.0 allows remote authenticated users to execute commands through inner templates. Environment::createTemplate() assigns a synthesized string_template hash name, causing a path-based SourcePolicyInterface to treat the inner template as unsandboxed and make checkSecurity() a no-op. Exploitation requires selective SourcePolicyInterface sandboxing, StringLoaderExtension, and permission to call template_from_string and include; successful templates can read secrets or invoke system commands.

The record

CVE
CVE-2026-46634
Published
Jul 14, 2026
Updated
Jul 14, 2026
Vendor
Twig
Product
Twig
Classifications
CWE-693, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 3.9.0, < 3.26.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Twig · Twigversion=>= 3.9.0, < 3.26.0

Published CVSS scores

7.7GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-693Protection Mechanism Failure
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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