Local file disclosure via nested stream wrapper
Published Aug 7, 2026 · Updated Aug 7, 2026
Path traversal in Smarty 5.0.0 through 5.8.3 allows remote authenticated users to read local files through crafted templates. BasePlugin::load maps the built-in stream resource directly to StreamPlugin before validating the nested PHP wrapper, and StreamPlugin::getContent passes that URI to fopen. Exploitation requires an application to render attacker-influenced templates with Smarty Security enabled and exposes files readable by the PHP process.
Summary
What happened
Path traversal in Smarty 5.0.0 through 5.8.3 allows remote authenticated users to read local files through crafted templates. BasePlugin::load maps the built-in stream resource directly to StreamPlugin before validating the nested PHP wrapper, and StreamPlugin::getContent passes that URI to fopen. Exploitation requires an application to render attacker-influenced templates with Smarty Security enabled and exposes files readable by the PHP process.
The record
- CVE
- CVE-2026-62996
- Published
- Aug 7, 2026
- Updated
- Aug 7, 2026
- Vendor
- Smarty
- Product
- Smarty
- Classifications
- CWE-22, T1005
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 7, 2026CVE publishedPublication date reported by the CVE source.
- Aug 7, 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=>= 5.0.0, < 5.8.4
What conditions does exploitation require?
What is affected?
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
- Smarty nested stream-wrapper bypass reproductionproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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