Skip to main content
HIGH

CVE-2024-26134

CVSS v3

7.5

HIGH

EPSS Score

1.2 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Get an alert for each new CVE published for cbor2.

Set up CVE WatchFree account · no credit card

Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • cbor2PyPIfrom 5.5.1 · fixed in 5.6.2

Vendor advisories

  • CVE-2024-26134 Red Hat Product Security

    cbor2: Potential buffer overflow in CBOR2 decoder

Full record on NVD

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.

Technical details

Published
2024-02-19

Frequently asked questions

What is CVE-2024-26134?

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.

Is CVE-2024-26134 actively exploited?

Active exploitation of CVE-2024-26134 has not been confirmed. Its EPSS score was 1.2% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-26134?

CVE-2024-26134 has a CVSS v3 base score of 7.5 (HIGH severity).

Running cbor2? Hear about its next vulnerability

CVE Watch matches each new CVE to the vendors and products you list (vendor and product, not the version) and puts it in your alerts with its KEV and EPSS status.

Already have an account? Open CVE WatchNo credit card required · No monthly cap on website lookups · 250 API requests/month