CVE-2026-11940

CVE Enrichment

CVSS: 7.8 HIGH
EPSS: 0.75%
EPSS Percentile: 54.18%
CISA KEV: Not listed

Description

tarfile.extractall() with the 'data' or 'tar' filter could be bypassed by a crafted archive where a hardlink references a symlink stored at a deeper name than the hardlink itself. The extraction fallback validated the symlink at it's archived location but recreated it at the hardlink's shallower path, letting a relative target the filter judged contained escape the destination directory. This allowed a malicious tar archive to create a symlink pointing outside the destination, enabling out-of-destination file reads or writes. This was an incomplete fix of CVE-2025-4330.

Technical Details

CVSS Version: 4.0
CNA / NVD Source: [email protected]
Published: 24-Jun-2026 00:16
Last Modified: 13-Aug-2026 08:16
EPSS Date: 2026-10-20
CWE: CWE-22, CWE-59

CVSS Vector


            CVSS:4.0                            AV:N /
                            AC:L /
                            AT:N /
                            PR:N /
                            UI:N /
                            VC:N /
                            VI:N /
                            VA:N /
                            SC:H /
                            SI:H /
                            SA:N /
                            E:X /
                            CR:X /
                            IR:X /
                            AR:X /
                            MAV:X /
                            MAC:X /
                            MAT:X /
                            MPR:X /
                            MUI:X /
                            MVC:X /
                            MVI:X /
                            MVA:X /
                            MSC:X /
                            MSI:X /
                            MSA:X /
                            S:X /
                            AU:X /
                            R:X /
                            V:X /
                            RE:X /
                            U:X

References

Last enrichment sync: 01-Nov-2026 20:31
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

The rest of that entry is five CVEs, among them a file overwrite issue, CVE-2026-11940, and incorrect handling of user and group IDs in tar files, CVE-2026-4360. Debian 13.7 Bundles 92 Security Advisories and Updates 106 Packages

CVE (19)

Products (18)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.