Service interruption via greedy issuu_id regex
Published Jan 13, 2026 · Updated Jan 13, 2026
Regular expression denial of service in tarteaucitron.js before 1.29.0 allows attackers to interrupt service via a crafted issuu_id value. The Issuu service handler applies an unanchored expression with greedy capture groups to issuu_id, causing excessive backtracking and CPU exhaustion. Exploitation requires control of the site configuration value; the published assessment treats this as a local, high-privilege path with no confidentiality or integrity impact.
Summary
What happened
Regular expression denial of service in tarteaucitron.js before 1.29.0 allows attackers to interrupt service via a crafted issuu_id value. The Issuu service handler applies an unanchored expression with greedy capture groups to issuu_id, causing excessive backtracking and CPU exhaustion. Exploitation requires control of the site configuration value; the published assessment treats this as a local, high-privilege path with no confidentiality or integrity impact.
The record
- CVE
- CVE-2026-22809
- Published
- Jan 13, 2026
- Updated
- Jan 13, 2026
- Vendor
- Amauri Champeaux
- Product
- tarteaucitron.js
- Classifications
- CWE-1333, T1499.004
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Jan 13, 2026CVE publishedPublication date reported by the CVE source.
- Jan 13, 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?
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- Affected versionversion=< 1.29.0
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
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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