CVE-2025-10148 The advisory has been revoked - it doesn't affect any version of package curl (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU2504-CURL-12613508
- published13 Sept 2025
- disclosed12 Sept 2025
Introduced: 12 Sep 2025
CVE-2025-10148 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:25.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Ubuntu.
curl's WebSocket code did not update the 32-bit mask pattern for each new outgoing frame as the specification says. Instead it used a fixed mask that persisted and was used throughout the entire connection.
A predictable mask pattern allows for a malicious server to induce traffic between the two communicating parties that could be interpreted by an involved proxy (configured or transparent) as genuine, real, HTTP traffic with content and thereby poison its cache. That cached poisoned content could then be served to all users of that proxy.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2025-10148
- https://curl.se/docs/CVE-2025-10148.json
- https://hackerone.com/reports/3330839
- http://www.openwall.com/lists/oss-security/2025/09/10/3
- http://www.openwall.com/lists/oss-security/2025/09/10/4
- https://curl.se/docs/CVE-2025-10148.html
- http://www.openwall.com/lists/oss-security/2025/09/10/2