ZDF
Sign inSign up

Vulnerabilities

Security fix · CVE-2025-68131

cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) serialization format.

Published Dec 31, 2025 · catalog updated Jan 2, 2026 · cbor2 provides encoding and

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-68131. EPSS is 0.46%. Act only if a listed version of cbor2 provides encoding and is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (cbor2 provides encoding and).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.46%
Remediation
Version ranges on file
Affected products
vendor agronholm cbor2 3.0.0, < 5.8.0

cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) serialization format. Starting in version 3.0.0 and prior to version 5.8.0, whhen a CBORDecoder instance is reused across multiple decode operations, values marked with the shareable tag (28) persist in memory and can be accessed by subsequent CBOR messages using the sharedref tag (29). This allows an attacker-controlled message to read data from previously decoded messages if the decoder is reused across trust boundaries. Version 5.8.0 patches the issue.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor agronholm cbor2 3.0.0, < 5.8.03.0.0, < 5.8.0

How to fix CVE-2025-68131

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-68131. EPSS is 0.46%. Act only if a listed version of cbor2 provides encoding and is installed.

Which versions are affected?

Compare what you have installed with agronholm cbor2 3.0.0, < 5.8.0 3.0.0, < 5.8.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.46%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 31, 2025 · EUVD

    Detected

    cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) serialization format. Starting in version 3.0.0 and prior to version 5.8.0, whhen a CBORDecoder instance is reused across multiple decode operations, values marked with the shareable tag (28) persist in memory and can be accessed by subsequent CBOR messages using the sharedref tag (29). This allows an attacker

  2. Jan 2, 2026 · EUVD

    Updated

    cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) serialization format. Starting in version 3.0.0 and prior to version 5.8.0, whhen a CBORDecoder instance is reused across multiple decode operations, values marked with the shareable tag (28) persist in memory and can be accessed by subsequent CBOR messages using the sharedref tag (29). This allows an attacker

Sources

  • CVE.orgVulnerability recordCVE-2025-68131

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-68131

    30-day exploitation probability 0.46%

    first.org
  • EUVDVulnerability recordEUVD-2025-205866

    cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) serialization format. Starting in version 3.0.0 and prior to version 5.8.0, whhen a CBORDecoder instance is reused across multiple decode operations, values marked with the shareable tag (28)

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 4, 2026
  • CVE.orgNov 2, 2026
  • EUVDNov 1, 2026