CVE-2024-26134

CBOR2 decoder has potential buffer overflow

HIGH
7.5
CVSS Score
Published: February 19, 2024 at 10:13 PM UTC
Updated: June 17, 2026 at 07:17 AM UTC
2 products affected across 2 vendorsFedoraCBOR2

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
PoC

Description

cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) (RFC 8949) serialization format. Starting in version 5.5.1 and prior to version 5.6.2, an attacker can crash a service using cbor2 to parse a CBOR binary by sending a long enough object. Version 5.6.2 contains a patch for this issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.6.25.5.1 ≤ v < 5.6.25.5.1
Affected range stops below 5.6.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-120

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