CVEvulnerability

CVE-2026-32239

6.3 MEDIUM Published 2026-03-12 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-03-12
Last modified
2026-06-17
Assigner
[email protected]
CVSS 4.0 ([email protected])
6.3 MEDIUM — CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weaknesses
CWE-190, CWE-444

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.

Affected configurations

• capnproto capnproto (< 1.4.0)

Related

Weakness · CWE (2)

  • CWE-190 Integer Overflow or Wraparound weakness
  • CWE-444 Inconsistent Interpretation of HTTP Requests weakness

References