| Name | CVE-2025-10148 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| curl (PTS) | bullseye | 7.74.0-1.3+deb11u13 | fixed |
| bullseye (security) | 7.74.0-1.3+deb11u15 | fixed |
| bookworm | 7.88.1-10+deb12u14 | vulnerable |
| bookworm (security) | 7.88.1-10+deb12u5 | vulnerable |
| trixie | 8.14.1-2 | vulnerable |
| forky, sid | 8.16.0-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| curl | source | bullseye | (not affected) | | | |
| curl | source | (unstable) | 8.16.0-1 | | | |
Notes
[trixie] - curl <no-dsa> (Minor issue)
[bookworm] - curl <ignored> (Minor issue; WebSocket support considered experimental feature, only enabled in builds since 8.8.0-2)
[bullseye] - curl <not-affected> (WebSocket support introduced later)
https://curl.se/docs/CVE-2025-10148.html
Fixed by: https://github.com/curl/curl/commit/84db7a9eae8468c0445b15aa806fa7fa806fa0f2 (curl-8_16_0)