CVE-2026-46633Network attack vector

PHP code execution via unescaped template name

Published Jul 14, 2026 · Updated Jul 14, 2026

Code injection in Twig before 3.26.0 allows remote attackers to execute arbitrary PHP code through a crafted use-tag template name. ModuleNode::compileConstructor() passes that name through Compiler::string() into a single-quoted PHP literal without escaping single quotes, so the name terminates the literal and injects expressions into the compiled cache file. Exploitation requires attacker-controlled template source; the injected code runs when the cache file is first loaded and bypasses the Twig sandbox.

CVSS severity9.3
Critical
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Twig before 3.26.0 allows remote attackers to execute arbitrary PHP code through a crafted use-tag template name. ModuleNode::compileConstructor() passes that name through Compiler::string() into a single-quoted PHP literal without escaping single quotes, so the name terminates the literal and injects expressions into the compiled cache file. Exploitation requires attacker-controlled template source; the injected code runs when the cache file is first loaded and bypasses the Twig sandbox.

The record

CVE
CVE-2026-46633
Published
Jul 14, 2026
Updated
Jul 14, 2026
Vendor
Twig
Product
Twig
Classifications
CWE-94, T1059
Attack vector
network
Privileges
unauthenticated

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=< 3.26.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Twig · Twigversion=< 3.26.0

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3GitHub Security AdvisoryCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.7GitHub, Inc. CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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