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Affected Component
Analysis
capnproto
Patched
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.
CWEs
Published Date
Updated Date
Workaround
-
Advisories
Analysis#
Vulnerability Ratings#
6.3
CVSSv4
6.5
CVSSv31
NaN
other
Others affected components#
Resolved with patches#
capnproto (buildroot:2025.02.x)
#
Title
Author
Resolve
1
Fix HTTP body size integer overflow bugs.
Kenton Varda <kenton@cloudflare.com>
CVE-2026-32239
CVE-2026-32240
capnproto (buildroot:master)
#
Title
Author
Resolve
1
Fix HTTP body size integer overflow bugs.
Kenton Varda <kenton@cloudflare.com>
CVE-2026-32239
CVE-2026-32240
capnproto (yocto:kirkstone)
#
Title
Author
Resolve
1
Fix HTTP body size integer overflow bugs.
Kenton Varda <kenton@cloudflare.com>
CVE-2026-32239
CVE-2026-32240
capnproto (yocto:scarthgap)
#
Title
Author
Resolve
1
Fix HTTP body size integer overflow bugs.
Kenton Varda <kenton@cloudflare.com>
CVE-2026-32239
CVE-2026-32240