CVE-2026-32239

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.

CVSS

No CVSS.

References

Link	Resource
https://capnproto.org/capnproto-c++-1.4.0.tar.gz
https://capnproto.org/capnproto-c++-win32-1.4.0.zip
https://github.com/capnproto/capnproto/commit/2744b3c012b4aa3c31cefb61ec656829fa5c0e36
https://github.com/capnproto/capnproto/commit/e929f0ba7901a6b8f4b5ba9a4db00af43288cbb0
https://github.com/capnproto/capnproto/security/advisories/GHSA-qjx3-pp3m-9jpm

Configurations

No configuration.

History

12 Mar 2026, 20:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-12 20:16

Updated : 2026-03-12 21:07

NVD link : CVE-2026-32239

Mitre link : CVE-2026-32239

CVE.ORG link : CVE-2026-32239

JSON object : View

Products Affected

No product.

CWE

CWE-190

Integer Overflow or Wraparound

CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

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