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No exploitation reportedFix availableAwaiting NVD analysis

CVE-2026-79705

No exploitation reported by the sources we read.

  • Published2026-09-15
  • WeaknessCWE-22

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-09-1517:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-04 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-79705?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-79705?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

Products declared by the CNA35 products

As redhat, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

29 more products in the CVE record.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-01

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • buildahAlpaquita:streamfrom 1.31.0-r0 · fixed in 1.45.1-r0
  • golang-github-containers-buildahUbuntu:Pro:26.04:LTSall versions · no fixed version listed
  • golang-github-containers-buildahUbuntu:Pro:24.04:LTSall versions · no fixed version listed
  • golang-github-containers-buildahUbuntu:26.10all versions · no fixed version listed
  • golang-github-containers-buildahUbuntu:22.04:LTSall versions · no fixed version listed
  • golang-github-containers-buildahDebian:14all versions · no fixed version listed
  • golang-github-containers-buildahDebian:13all versions · no fixed version listed
  • golang-github-containers-buildahDebian:12all versions · no fixed version listed

4 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-79705 Red Hat Product Security11 products fixed · 66 known affected

    podman: buildah: buildah/copier: Directory escape via crafted tar symlinks when used outside Buildah by non-root callers

    ansible-automation-platform-24/eda-controller-rhel8 as a component of Red Hat Ansible Automation Platform 2 · ansible-automation-platform-25/eda-controller-rhel8 as a component of Red Hat Ansible Automation Platform 2 · ansible-automation-platform-26/eda-controller-rhel9 as a component of Red Hat Ansible Automation Platform 2 · +63 more

  • RHSA-2026:74861 Red Hat Product Security11 products fixed

    Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2026:74861 · 11 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
  2. Workaround from the vendor Red Hat Product Security RHSA-2026:74861 · 11 productsTo mitigate this issue, users should ensure that `podman cp` operations are only performed against trusted Podman system service servers. Copying content from untrusted sources may expose the client to directory traversal vulnerabilities.
  3. No fix available, says the vendor Red Hat Product Security CVE-2026-79705 · 66 productsFix deferred

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N
Published
2026-09-15
Last Modified
2026-10-30
NVD status
Awaiting Analysis
GitHub Advisory
GHSA-fmxx-r7q4-v8m6

Frequently asked questions

What is CVE-2026-79705?

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.

Is CVE-2026-79705 actively exploited?

Active exploitation of CVE-2026-79705 has not been confirmed. Its EPSS score was 0.4% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-79705?

CVE-2026-79705 has a CVSS v3 base score of 4.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N.

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Sources for this record