Application stop via recursive class-name fallback
Published Jul 11, 2025 · Updated Nov 4, 2025
Uncontrolled recursion in Apache Commons Lang 2.0 through 2.6 and 3.0 before 3.18.0 allows remote attackers to stop applications via long class names. ClassUtils.getClass recursively replaces each final package separator with an inner-class separator after Class.forName rejects a candidate, so a name with many separators exhausts the thread stack. Reachability depends on an application passing attacker-controlled class names to this library method; the resulting unhandled StackOverflowError interrupts that application.
Summary
What happened
Uncontrolled recursion in Apache Commons Lang 2.0 through 2.6 and 3.0 before 3.18.0 allows remote attackers to stop applications via long class names. ClassUtils.getClass recursively replaces each final package separator with an inner-class separator after Class.forName rejects a candidate, so a name with many separators exhausts the thread stack. Reachability depends on an application passing attacker-controlled class names to this library method; the resulting unhandled StackOverflowError interrupts that application.
The record
- CVE
- CVE-2025-48924
- Published
- Jul 11, 2025
- Updated
- Nov 4, 2025
- Vendor
- The Apache Software Foundation
- Product
- Apache Commons Lang
- Classifications
- CWE-674, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 11, 2025CVE 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?
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- Affected versionversion=2.0 <=2.6
- Affected versionversion=3.0 <3.18.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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Your stack
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