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MEDIUM severity

CVE-2025-53604 — web-push

MEDIUMFix: pimeys/rust-web-push#68

CVE-2025-53604 is a medium-severity (CVSS 4) CWE-130 vulnerability in web-push. A fix is available for web-push — see the affected versions and patch details below.

Rust Web Push is vulnerable to a DoS attack via a large integer in a Content-Length header

Also known asGHSA-fc83-9jwq-gc2mRUSTSEC-2025-0015
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-53604.

EPSS Exploitation Probability

via FIRST.org ↗
0.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs36th percentile — riskier than 36% of all scored CVEsHighest risk
0.00%0.30%0.61%0.91%0.3%0.4%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🦀web-push

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.

Description

The web-push crate before 0.10.4 for Rust allows a denial of service (memory consumption) in the built-in clients via a large integer in a Content-Length header. The patch was initially made available in version 0.10.3, but version 0.10.3 has since been yanked.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🦀crates.ioweb-pushall versions0.10.4cargo update -p web-push --precise 0.10.4

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for web-push, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update web-push to 0.10.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-53604 is resolved across your whole dependency graph.

  3. Workarounds

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

The web-push crate before 0.10.4 for Rust allows a denial of service (memory consumption) in the built-in clients via a large integer in a Content-Length header. The patch was initially made available in version 0.10.3, but version 0.10.3 has since been yanked.
O3 Security · Impact-Aware SCA

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CVE-2025-53604: web-push DoS — Fixed in 0.10.4