Browser hang via backtracking data URI regex
Published Jun 9, 2025 · Updated Jun 10, 2025
Regular-expression denial of service in Metabase 54.10 allows remote authenticated users to hang a browser via a crafted data URI. The parseDataUri function applies an ambiguous, anchored JavaScript regex with nested optional matches to untrusted text, causing excessive backtracking on a long nonmatching value. A reachable UI path must pass attacker-controlled text into this client-side parser, where processing can monopolize the browser's CPU without altering or disclosing data.
Summary
What happened
Regular-expression denial of service in Metabase 54.10 allows remote authenticated users to hang a browser via a crafted data URI. The parseDataUri function applies an ambiguous, anchored JavaScript regex with nested optional matches to untrusted text, causing excessive backtracking on a long nonmatching value. A reachable UI path must pass attacker-controlled text into this client-side parser, where processing can monopolize the browser's CPU without altering or disclosing data.
The record
- CVE
- CVE-2025-5895
- Published
- Jun 9, 2025
- Updated
- Jun 10, 2025
- Vendor
- Metabase
- Product
- Metabase
- Classifications
- CWE-1333, CAPEC-492, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 9, 2025CVE publishedPublication date reported by the CVE source.
- Jun 10, 2025Record 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=54.10
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
- parseDataUri malicious data URI regression vectorproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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