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Vendor

capnproto

4 known vulnerabilities.

capnproto at a glance

Last 12 months
2
Critical · all time
0
Exploited · all time
0
Public exploit · all time
0
New vulnerabilities per month · last 12 months
0 1 2 December 2025: 0 vulnerabilities Dec 2025 January 2026: 0 vulnerabilities February 2026: 0 vulnerabilities March 2026: 2 vulnerabilities Mar April 2026: 0 vulnerabilities May 2026: 0 vulnerabilities June 2026: 0 vulnerabilities Jun July 2026: 0 vulnerabilities August 2026: 0 vulnerabilities September 2026: 0 vulnerabilities Sep October 2026: 0 vulnerabilities November 2026: 0 vulnerabilities
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Products

capnproto 4
All Critical High Medium Low Exploited only Public exploit

4 results · Feed

  • Medium 6.3
    CVE-2026-32240

    Cap'n Proto: Integer overflow in KJ-HTTP chunk size

    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…

    capnproto capnproto capnproto capnproto Debian Ubuntu
  • Medium 6.3
    CVE-2026-32239

    Cap'n Proto has an integer overflow in KJ-HTTP

    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 smug…

    capnproto capnproto capnproto capnproto Debian Ubuntu
  • Medium 5.9
    CVE-2023-48230

    Cap'n Proto WebSocket message can cause crash

    Cap'n Proto is a data interchange format and capability-based RPC system. In versions 1.0 and 1.0.1, when using the KJ HTTP library with WebSocket compression enabled, a buffer underrun can be caused by a remote peer. The underrun always writes a constant val…

    capnproto capnproto capnproto Debian
  • Medium 5.4
    CVE-2022-46149

    Cap'n Proto vulnerable to out-of-bounds read due to logic error handling list-of-list.

    Cap'n Proto is a data interchange format and remote procedure call (RPC) system. Cap'n Proro prior to versions 0.7.1, 0.8.1, 0.9.2, and 0.10.3, as well as versions of Cap'n Proto's Rust implementation prior to 0.13.7, 0.14.11, and 0.15.2 are vulnerable to out…

    capnproto capnproto capnproto capnproto Debian Ubuntu crates.io