CVE-2026-24425Network attack vector

Code execution via source-unaware callback checks

Published May 20, 2026 · Updated May 20, 2026

Sandbox bypass in Twig 2.16.x and 3.9.0 through 3.25.x allows remote authenticated users to execute arbitrary PHP code through crafted templates. The callback checks for sort, filter, map, and reduce omit the current template Source, so source-policy sandboxing accepts non-Closure PHP callables. Exploitation requires template-rendering capability, a SourcePolicyInterface-enabled sandbox that is not global, an affected filter, and a non-Closure callback.

CVSS severity9.9
Critical
EPSS probability0.76%
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 2.16.x and 3.9.0 through 3.25.x allows remote authenticated users to execute arbitrary PHP code through crafted templates. The callback checks for sort, filter, map, and reduce omit the current template Source, so source-policy sandboxing accepts non-Closure PHP callables. Exploitation requires template-rendering capability, a SourcePolicyInterface-enabled sandbox that is not global, an affected filter, and a non-Closure callback.

The record

CVE
CVE-2026-24425
Published
May 20, 2026
Updated
May 20, 2026
Vendor
Twig
Product
Twig
Classifications
CWE-693, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2026CVE publishedPublication date reported by the CVE source.
  2. May 20, 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=2.16.*
  2. Affected versionversion=3.9.0 <3.26.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Twig · Twigversion=2.16.*; version=3.9.0 <3.26.0

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.9NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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