How severe is CVE-2024-26134?

CVE-2024-26134 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-26134 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-26134?

CVE-2024-26134 primarily affects Agronholm Cbor2. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-26134?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-26134 have an EU (EUVD) identifier?

Yes. CVE-2024-26134 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0204.

When was CVE-2024-26134 published?

CVE-2024-26134 was published on 2024-02-19 and last updated on 2026-06-17.

CVE-2024-26134

CVE-2024-26134 is a high-severity vulnerability in Agronholm Cbor2 with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-0204
Weakness: CWE-120
Affected product: Agronholm Cbor2
Published: 2024-02-19
Last modified: 2026-06-17

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.

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.
How severe is CVE-2024-26134?: CVE-2024-26134 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-26134 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-26134?: CVE-2024-26134 primarily affects Agronholm Cbor2. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-26134?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-26134 have an EU (EUVD) identifier?: Yes. CVE-2024-26134 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0204.
When was CVE-2024-26134 published?: CVE-2024-26134 was published on 2024-02-19 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:agronholm:cbor2:*:*:*:*:*:python:*:*
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:*

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