CVE catalog
CVE-2025-68131
cbor2: CVE-2025-68131
- Severity
- Medium · CVSS 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.46% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | cbor2 | sid | 6.1.2-2 | fixed |
| Debian | cbor2 | forky | 6.1.2-2 | fixed |
| Debian | cbor2 | trixie | 5.6.5-1 | vulnerable |
| Debian | cbor2 | bookworm | 5.4.6-1 | vulnerable |
| PyPI | cbor2 | Not reported | 5.8.0 | fixed |
| Suse | python-cbor2 | linux enterprise server 16.0 | 5.6.5-160000.4.1 | fixed |
| Suse | python-cbor2 | linux enterprise server for sap applications 16.0 | 5.6.5-160000.4.1 | fixed |
| Opensuse | python-cbor2 | leap 16.0 | 5.6.5-160000.4.1 | fixed |
| Opensuse | python-cbor2 | tumbleweed | 5.8.0-2.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | cbor2 | source | sid | 5.8.0-1 | unimportant | Not reported | Not reported |
| Debian | cbor2 | source | forky | 5.8.0-1 | unimportant | Not reported | Not reported |
| Debian | cbor2 | source | trixie | (unfixed) | unimportant | Not reported | Not reported |
| Debian | cbor2 | source | bookworm | (unfixed) | unimportant | Not reported | Not reported |
| PyPI | cbor2 | PyPI | Not reported | 5.8.0 | Not reported | GHSA-WCJ4-JW5J-44WH | Not reported |
| Suse | python-cbor2 | rpm | linux enterprise server 16.0 | 5.6.5-160000.4.1 | Not reported | SUSE-SU-2026:21139-1 | Not reported |
| Suse | python-cbor2 | rpm | linux enterprise server for sap applications 16.0 | 5.6.5-160000.4.1 | Not reported | SUSE-SU-2026:21139-1 | Not reported |
| Opensuse | python-cbor2 | rpm | leap 16.0 | 5.6.5-160000.4.1 | Not reported | OPENSUSE-SU-2026:20468-1 | Not reported |
| Opensuse | python-cbor2 | rpm | tumbleweed | 5.8.0-2.1 | Not reported | OPENSUSE-SU-2026:10014-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [python3-cbor2]Affected
Source package: [cbor2]
Details (2)
5.4.6-1+b1· amd64 · bookwormAffected
dsa · cbor2 · debian · bookworm; dsa · cbor2 · debian · 12
5.4.6-1+b1· arm64 · bookwormAffected
dsa · cbor2 · debian · bookworm; dsa · cbor2 · debian · 12
- [python-cbor2-doc]Affected
Source package: [cbor2]
Details (2)
5.4.6-1· all · bookwormAffected
dsa · cbor2 · debian · bookworm; dsa · cbor2 · debian · 12
5.4.6-1· all · bookwormAffected
dsa · cbor2 · debian · bookworm; dsa · cbor2 · debian · 12
[Debian 13 (Trixie)]
- [python3-cbor2]Affected
Source package: [cbor2]
Details (4)
5.6.5-1· amd64 · trixieAffected
dsa · cbor2 · debian · 13
5.6.5-1· arm64 · trixieAffected
dsa · cbor2 · debian · 13
5.9.0-2~bpo13+2· amd64 · trixie-backportsAffected
dsa · cbor2 · debian · 13
5.9.0-2~bpo13+2· arm64 · trixie-backportsAffected
dsa · cbor2 · debian · 13
- [python-cbor2-doc]Affected
Source package: [cbor2]
Details (4)
5.6.5-1· all · trixieAffected
dsa · cbor2 · debian · 13
5.6.5-1· all · trixieAffected
dsa · cbor2 · debian · 13
5.9.0-2~bpo13+2· all · trixie-backportsAffected
dsa · cbor2 · debian · 13
5.9.0-2~bpo13+2· all · trixie-backportsAffected
dsa · cbor2 · debian · 13
[openSUSE Tumbleweed]
- [python313-cbor2]Unknown
Source package: [python-cbor2]
Details (1)
5.9.0-1.5· x86_64 · tumbleweedUnknown · Fixed:
5.8.0-2.1Version impact unknown
dsa · python-cbor2 · opensuse · tumbleweed
- [python314-cbor2]Unknown
Source package: [python-cbor2]
Details (1)
5.9.0-1.5· x86_64 · tumbleweedUnknown · Fixed:
5.8.0-2.1Version impact unknown
dsa · python-cbor2 · opensuse · tumbleweed
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_10014-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2025-68131]
- [https://osv.dev/vulnerability/GHSA-wcj4-jw5j-44wh]
- [https://osv.dev/vulnerability/SUSE-SU-2026:21139-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:10014-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:20468-1]
- [https://security-tracker.debian.org/tracker/CVE-2025-68131]
- [https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68131.json]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]