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TI-2026-58829 Aliases CVE-2026-85731GHSA-m37j-52j7-pjw7

oras-go: Arbitrary file write outside file.Store root via symlink-chain bypass in tar extraction (pushDir)

Priority HIGH 73CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

oras-go is a Go library for managing OCI artifacts. Prior to 2.6.2, content/file.Store extraction of OCI layers marked with io.deis.oras.content.unpack=true can write outside the store working directory. The pushDir path through extractTarDirectory and ensureLinkPath validates symlink targets lexically, resolveRelToBase skips its parent-symlink walk for root-level entries, and writeFile follows a terminal symlink when opening a regular file. A malicious archive can therefore create a symlink chain whose lexical target remains inside the extraction root but whose resolved target is an attacker-selected absolute path, then overwrite that target with a same-named regular-file entry even when AllowPathTraversalOnWrite is false. Pulling an attacker-controlled artifact can create or overwrite any file writable by the process and may lead to code execution. This issue is fixed in version 2.6.2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00676 52nd percentileScored 2026-11-07
Fix Partial oras-go (oras-project): 2.6.2oras.land/oras-go/v2 (Go): 2.6.2Red Hat: 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
oras-projectoras-gobefore 2.6.22.6.2Patch availableCNA
—oras.land/oras-go/v2 (Go)before 2.6.22.6.2Patch availableGHSA-m37j-52j7-pjw7
  • oras-go Vendororas-project Affected before 2.6.2 Fixed in 2.6.2 Patch available CNA
  • oras.land/oras-go/v2 (Go) Vendor— Affected before 2.6.2 Fixed in 2.6.2 Patch available GHSA-m37j-52j7-pjw7

Remediation

  • Fix · CNA oras-go (oras-project) Fixed in 2.6.2
  • Fix · GHSA-m37j-52j7-pjw7 oras.land/oras-go/v2 (Go) Fixed in 2.6.2 Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-85731
  2. 2026-10-03 Alias added: GHSA-m37j-52j7-pjw7
  3. 2026-10-04 EPSS moved to the 50th–90th percentile
  4. 2026-11-06 Affected versions changed · Red Hat

References

Advisory 1

Other 4

  • TI-2026-36926 oras-go: file store write outside workingDir via symlink traversal CVSS 4.0MEDIUM 6.9
  • TI-2026-36927 Path traversal in oras-project oras-go CVSS 3.1HIGH 7.1
  • TI-2026-58830 oras-go: Blind SSRF via unvalidated Link header URL in pagination allows internal network probing CVSS 3.1MEDIUM 4.7
  • TI-2026-40126 ORAS CLI: Cyclic Referrer Graph Can Cause Unbounded Recursion and Resource Consumption CVSS 3.1MEDIUM 6.5
  • TI-2026-36234 oras-go: Malicious registry can hijack Bearer token realm to exfiltrate credentials and refresh tokens CVSS 4.0LOW 2.1

Sources

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