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CVE-2026-79705· NVD / CVE Program· CNA redhat

Podman: buildah: buildah/copier: directory escape via crafted tar symlinks when used outside buildah by non-root callers

Noroxi assessment

Priority: Monitor (action score 18/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.40% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. Administrator privileges are required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: podman (Red Hat:hummingbird:1) 0:6.1.3-1.hum1; podman-docker (Red Hat:hummingbird:1) 0:6.1.3-1.hum1; podman-machine (Red Hat:hummingbird:1) 0:6.1.3-1.hum1.

Low priority for now. Upgrade to podman (Red Hat:hummingbird:1) 0:6.1.3-1.hum1; podman-docker (Red Hat:hummingbird:1) 0:6.1.3-1.hum1; podman-machine (Red Hat:hummingbird:1) 0:6.1.3-1.hum1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

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.

MediumCVSS 4.5 · v3.1—No exploit Fix available
Published
Sep 15, 2026
Updated
Oct 2, 2026
EPSS
0.4% · 33th percentile

Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
18 / 40 · 4.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
4.5
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-79705

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat Ansible Automation Platform 2

    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 10

    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 8

    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 9

    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected
    • all versionsaffected

  • Red Hat Red Hat Hardened Images

    • 6.1.3-1.hum1 and laternot affected · rpm
    • all versionsunknown

  • Red Hat Red Hat OpenShift Container Platform 4

    • all versionsaffected
    • all versionsaffected
    • all versionsaffected

  • Red Hat Red Hat OpenShift Dev Spaces

    • all versionsaffected
    • all versionsaffected
    • all versionsaffected

  • Red Hat Red Hat OpenShift Virtualization 4

    • all versionsaffected

  • Red Hat Red Hat Quay 3

    • all versionsaffected
    • all versionsaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12golang-github-containers-buildahall versions—
Red Hat:hummingbird:1podmanbefore 0:6.1.3-1.hum10:6.1.3-1.hum1
Red Hat:hummingbird:1podman-dockerbefore 0:6.1.3-1.hum10:6.1.3-1.hum1
Red Hat:hummingbird:1podman-machinebefore 0:6.1.3-1.hum10:6.1.3-1.hum1
Red Hat:hummingbird:1podman-remotebefore 0:6.1.3-1.hum10:6.1.3-1.hum1
Red Hat:hummingbird:1podmanshbefore 0:6.1.3-1.hum10:6.1.3-1.hum1

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-90959Pulpcore: pulpcore: file:// scheme allowlist bypass in content upload file_url field enables arbitrary file read and pulp container registry signing key theft
    32Monitor
  • CVE-2026-44191Ansible-lightspeed: visual studio code ansible lightspeed extension: remote code execution via command injection in configuration settings
    31Monitor
  • CVE-2026-44190Ansible-lightspeed: ansible lightspeed visual studio code extension: arbitrary code execution via command injection in activation script setting
    31Monitor
  • CVE-2026-44189Ansible-lightspeed: visual studio code ansible lightspeed extension: arbitrary code execution via malicious playbook filename
    31Monitor
  • CVE-2026-12398Galaxy_ng: shell injection in legacy role import via unsanitized git ref names
    30Monitor
  • CVE-2026-94416Aap-gateway: aap-gateway: authorization bypass via workload identity token forgery
    27Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
azl3 libcontainers-common 20240213-3 on Azure Linux 3.0—Microsoft (MSRC)
red hat:podman0:6.1.3-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:podman-docker0:6.1.3-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:podman-machine0:6.1.3-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:podman-remote0:6.1.3-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:podmansh0:6.1.3-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-909599 days apartPulpcore: pulpcore: file:// scheme allowlist bypass in content upload file_url field enables arbitrary file read and pulp container registry signing key theft
    32Monitor
  • CVE-2026-4419255 days apartAnsible-lightspeed: ansible lightspeed mcp server: remote code execution and data exfiltration via path traversal
    26Monitor
  • CVE-2026-10375416 days apartAnsible-runner: ansible-runner: path traversal and symlink escape in unstream_dir() allows file write outside the target directory
    23Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2026-944169 days apartAap-gateway: aap-gateway: authorization bypass via workload identity token forgery
    27Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • Administrator privileges are required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N

nvd-secondary

Root cause

A user-supplied file name is joined with the allowed directory, but the result is never checked to confirm it is still inside that directory.

The bug in code

The whole CWE-22 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
const file = path.join(ROOT, req.query.name);res.sendFile(file);

Fixed

ts
const file = path.resolve(ROOT, req.query.name);if (!file.startsWith(ROOT + path.sep)) {  return res.sendStatus(400);}res.sendFile(file);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records