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CVE-2026-79705 (GCVE-0-2026-79705)

Vulnerability from cvelistv5 – Published: 2026-09-15 16:23 – Updated: 2026-09-15 17:58
VLAI
Title
Podman: buildah: buildah/copier: directory escape via crafted tar symlinks when used outside buildah by non-root callers
Summary
A flaw was found in the buildah/copier Go package. When used outside of Buildah by a non-root caller, a crafted tar archive containing malicious symlinks can escape the target extraction directory and create files outside the intended destination. Buildah itself uses chroot hardening and is not affected.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 17:28 UTC
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-79705 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2523419 issue-trackingx_refsource_REDHAT
Date Public
2026-09-15 00:00
Show details on NVD website

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      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-15T17:58:39+00:00",
      "cve": "CVE-2026-79705",
      "id": "CVE-2026-79705",
      "initial_release_date": "2026-09-15T00:00:00+00:00",
      "product_status:known_affected": "67",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "podman: buildah: buildah/copier: Directory escape via crafted tar symlinks when used outside Buildah by non-root callers",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-79705.json",
      "version": "3"
    },
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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