What is the CVSS score of CVE-2026-32239?

CVE-2026-32239 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Capnproto are affected by CVE-2026-32239?

CVE-2026-32239 presents notable security risk, a integer overflow vulnerability rated CVSS 6.5. Exploitation could cause memory corruption or application crashes.. A patch is available.

Capnproto CVE-2026-32239

MEDIUM

Integer Overflow or Wraparound (CWE-190)

2026-03-12 security-advisories@github.com

Information Disclosure Integer Overflow Red Hat Capnproto Suse

6.5

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:55 vuln.today

CVE Published

Mar 12, 2026 - 20:16 nvd

MEDIUM 6.5

DescriptionNVD

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.

AnalysisAI

n Proto is a data interchange format and capability-based RPC system. versions up to 1.4.0 is affected by integer overflow or wraparound.

RemediationAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory