Service interruption via unbounded response allocation
Published Jul 5, 2025 · Updated Jul 8, 2025
Denial of service in the web-push crate before 0.10.3 allows remote attackers to exhaust client memory through a malicious endpoint. HyperWebPushClient and IsahcWebPushClient allocate response buffers from an untrusted Content-Length value without enforcing a size limit. Exploitation requires a service to send a notification to an attacker-controlled Web Push endpoint, causing the sending process to exhaust memory and terminate or become unavailable.
Summary
What happened
Denial of service in the web-push crate before 0.10.3 allows remote attackers to exhaust client memory through a malicious endpoint. HyperWebPushClient and IsahcWebPushClient allocate response buffers from an untrusted Content-Length value without enforcing a size limit. Exploitation requires a service to send a notification to an attacker-controlled Web Push endpoint, causing the sending process to exhaust memory and terminate or become unavailable.
The record
- CVE
- CVE-2025-53604
- Published
- Jul 5, 2025
- Updated
- Jul 8, 2025
- Vendor
- Marco Castelluccio
- Product
- web-push
- Classifications
- CWE-130, CWE-770, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 5, 2025CVE publishedPublication date reported by the CVE source.
- Jul 8, 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=0 <0.10.3
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
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
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Technologies
Your stack
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Your stack
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