CVE-2026-32240

Published: Mar 12, 2026 Last Modified: Mar 12, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 6,3
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A

Description

AI Translation Available

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.

197

Numeric Truncation Error

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity
Potential Impacts:
Modify Memory
Applicable Platforms
Languages: C, C#, C++, Java
Likelihood of Exploit: Low
View CWE Details
444

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

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Non-Repudiation Access Control
Potential Impacts:
Unexpected State Hide Activities Bypass Protection Mechanism
Applicable Platforms
Technologies: Web Based, Web Server
View CWE Details
https://capnproto.org/capnproto-c++-1.4.0.tar.gz
https://capnproto.org/capnproto-c++-1.4.0.tar.gz
https://capnproto.org/capnproto-c++-win32-1.4.0.zip
https://capnproto.org/capnproto-c++-win32-1.4.0.zip
https://github.com/capnproto/capnproto/commit/2744b3c012b4a…
https://github.com/capnproto/capnproto/commit/2744b3c012b4aa3c31cefb61ec656829f…
https://github.com/capnproto/capnproto/commit/e929f0ba7901a…
https://github.com/capnproto/capnproto/commit/e929f0ba7901a6b8f4b5ba9a4db00af43…
https://github.com/capnproto/capnproto/security/advisories/…
https://github.com/capnproto/capnproto/security/advisories/GHSA-vpcq-mx5v-32wm