CVE-2026-32240

Name
CVE-2026-32240
Description
Cap'n Proto is a data interchange format and capability-based RPC system. Prior to 1.4.0, when using Transfer-Encoding: chunked, if a chunk's size parsed to a value of 2^64 or larger, it would be truncated to a 64-bit integer. In theory, this bug could enable HTTP request/response smuggling. This vulnerability is fixed in 1.4.0.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
security-advisories@github.com https://capnproto.org/capnproto-c++-1.4.0.tar.gz
security-advisories@github.com https://capnproto.org/capnproto-c++-win32-1.4.0.zip
security-advisories@github.com https://github.com/capnproto/capnproto/commit/2744b3c012b4aa3c31cefb61ec656829fa5c0e36
security-advisories@github.com https://github.com/capnproto/capnproto/commit/e929f0ba7901a6b8f4b5ba9a4db00af43288cbb0
security-advisories@github.com https://github.com/capnproto/capnproto/security/advisories/GHSA-vpcq-mx5v-32wm

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:capnproto:capnproto:*:*:*:*:*:*:*:* capnproto >= None < 1.4.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
capnproto edge-community 1.3.0-r0 Luca Weiss <luca@lucaweiss.eu> possibly vulnerable
capnproto edge-community 1.2.0-r0 Luca Weiss <luca@lucaweiss.eu> possibly vulnerable
capnproto edge-community 1.1.0-r0 Luca Weiss <luca@lucaweiss.eu> possibly vulnerable
capnproto edge-community 1.0.2-r2 Luca Weiss <luca@lucaweiss.eu> possibly vulnerable
capnproto 3.23-community 1.2.0-r0 Luca Weiss <luca@lucaweiss.eu> possibly vulnerable