Service interruption via quadratic punctuation trimming
Published Aug 7, 2024 · Updated Nov 4, 2025
Denial of service in Django 4.2 before 4.2.15 and 5.0 before 5.0.8 allows remote attackers to interrupt service via crafted input. The trim_punctuation routine repeatedly rescans ampersand-and-semicolon suffixes while stripping punctuation, causing quadratic work on long sequences such as &.;. Exposure requires an application to pass attacker-controlled, very large text through urlize() or urlizetrunc(); CPU exhaustion can stall request handling.
Summary
What happened
Denial of service in Django 4.2 before 4.2.15 and 5.0 before 5.0.8 allows remote attackers to interrupt service via crafted input. The trim_punctuation routine repeatedly rescans ampersand-and-semicolon suffixes while stripping punctuation, causing quadratic work on long sequences such as &.;. Exposure requires an application to pass attacker-controlled, very large text through urlize() or urlizetrunc(); CPU exhaustion can stall request handling.
The record
- CVE
- CVE-2024-41990
- Published
- Aug 7, 2024
- Updated
- Nov 4, 2025
- Vendor
- Django Software Foundation
- Product
- Django
- Classifications
- CWE-130, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 7, 2024CVE publishedPublication date reported by the CVE source.
- Nov 4, 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=4.2 <4.2.15
- Affected versionversion=5.0 <5.0.8
- Affected versionversion=pkg:pypi/[email protected] <pkg:pypi/[email protected]
- Affected versionversion=pkg:pypi/[email protected] <pkg:pypi/[email protected]
What conditions does exploitation require?
What is affected?
Published CVSS scores
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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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