Service interruption via unbounded sandbox operations
Published Jul 14, 2026 · Updated Jul 14, 2026
Resource exhaustion in the Twig sandbox before 3.26.0 allows remote authenticated users to interrupt service via untrusted templates. The sandbox enforces code and data allow-lists but imposes no CPU, memory, or wall-clock limits, so large ranges, nested loops, recursive macros, expensive filters, or deeply nested includes can run without bounds. Exploitation requires an application to render attacker-supplied template source; the resulting workload can exhaust process resources and interrupt that application.
Summary
What happened
Resource exhaustion in the Twig sandbox before 3.26.0 allows remote authenticated users to interrupt service via untrusted templates. The sandbox enforces code and data allow-lists but imposes no CPU, memory, or wall-clock limits, so large ranges, nested loops, recursive macros, expensive filters, or deeply nested includes can run without bounds. Exploitation requires an application to render attacker-supplied template source; the resulting workload can exhaust process resources and interrupt that application.
The record
- CVE
- CVE-2026-46627
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- Twig
- Product
- Twig
- Classifications
- CWE-400, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- 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.
- Affected versionversion=< 3.26.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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