| Name | CVE-2026-32239 |
| Description | Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, a negative Content-Length value was converted to unsigned, treating it as an impossibly large length instead. In theory, this bug could enable HTTP request/response smuggling. This vulnerability is fixed in 1.4.0. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1130877 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| capnproto (PTS) | bullseye | 0.7.0-7 | vulnerable |
| bookworm | 0.9.2-2 | vulnerable | |
| trixie | 1.1.0-2 | vulnerable | |
| forky, sid | 1.4.0-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| capnproto | source | experimental | 1.4.0-1 | |||
| capnproto | source | (unstable) | 1.4.0-2 | 1130877 |
[trixie] - capnproto <no-dsa> (Minor issue)
[bookworm] - capnproto <postponed> (minor issue)
[bullseye] - capnproto <postponed> (minor issue)
https://github.com/capnproto/capnproto/security/advisories/GHSA-qjx3-pp3m-9jpm
Fixed by: https://github.com/capnproto/capnproto/commit/2744b3c012b4aa3c31cefb61ec656829fa5c0e36 (v1.4.0)