CVE-2026-49981Public exploitNetwork attack vectorHinoki check available

Authenticated sandbox bypass via stale cached verdict

Published Jul 14, 2026 · Updated Jul 14, 2026

Sandbox bypass in Twig before 3.27.0 allows remote authenticated users to run disallowed filters, tags, and functions via crafted templates. Template construction runs checkSecurity once, and Environment retains that verdict after sandbox state or SecurityPolicy changes. Exploitation requires attacker-controlled sandboxed templates and a reused Environment with templates loaded under another policy; method and property checks remain enforced.

CVSS severity6.0
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Sandbox bypass in Twig before 3.27.0 allows remote authenticated users to run disallowed filters, tags, and functions via crafted templates. Template construction runs checkSecurity once, and Environment retains that verdict after sandbox state or SecurityPolicy changes. Exploitation requires attacker-controlled sandboxed templates and a reused Environment with templates loaded under another policy; method and property checks remain enforced.

The record

CVE
CVE-2026-49981
Published
Jul 14, 2026
Updated
Jul 14, 2026
Vendor
Twig
Product
Twig
Classifications
CWE-863, CWE-693
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=< 3.27.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Twig · Twigversion=< 3.27.0

Published CVSS scores

8.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
6.0GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-693Protection Mechanism Failure

Public exploit references

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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