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TI-2026-49336 Aliases CVE-2026-70622GHSA-c2qp-v5vm-7vxf

tar-rs 0.4.11 - 0.4.46 Symlink Escape via append_dir_all()

Priority MEDIUM 64CWE-59Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-59 and the CVSS impact.

Summary

tar-rs versions 0.4.11 through 0.4.46 contain a symlink escape vulnerability in the Builder::append_dir_all() function that allows attackers to read files outside the intended source root directory by planting symlinks in an attacker-controlled directory. When a privileged process archives an untrusted directory, the function follows symlinks without verifying that resolved targets remain within the source root, causing out-of-bounds files to be included in the archive as regular files and disclosed to the attacker.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0046 40th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
composefstar-rs0.4.11 – 0.4.46—No fix listedCNA
  • tar-rs Vendorcomposefs Affected 0.4.11 – 0.4.46 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Ansible Automation Orchestrator 2026AffectedNo fix yet
OpenShift LightspeedAffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux 8AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet
Red Hat OpenShift Container Platform 4AffectedNo fix yet
Red Hat OpenShift Update ServiceAffectedNo fix yet
Red Hat Satellite 6AffectedNo fix yet
Not affected: 14 products
  • Confidential Compute Attestation
  • Pen Drive Powered by Red Hat Lightspeed
  • Red Hat Ansible Automation Platform 2
  • Red Hat Ansible Automation Platform Ansible Core 2
  • Red Hat Discovery 2
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux command line assistant
  • Red Hat Hardened Images
  • Red Hat Offline Knowledge Portal
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenShift Container Platform 5
  • Red Hat Quay 3
  • Red Hat Trusted Profile Analyzer

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-70622
  2. 2026-10-03 Alias added: GHSA-c2qp-v5vm-7vxf
  3. 2026-10-16 Affected versions changed · Red Hat
  4. 2026-10-20 Affected versions changed · Red Hat
  5. 2026-10-21 Affected versions changed · Red Hat
  6. 2026-10-22 Affected versions changed · Red Hat
  7. 2026-10-27 Affected versions changed · Red Hat
  8. 2026-10-30 Affected versions changed · Red Hat
  9. 2026-11-04 Affected versions changed · Red Hat

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences