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Public proof of conceptFix available

CVE-2026-70622

A public proof of concept exists; no exploitation attested.

  • Published2026-08-10
  • WeaknessCWE-59

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

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.

Timeline

dates in UTC
  1. 2026-08-1018:18CVE publishedNVD

Versions per branch

Products declared by the CNA1 product

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

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-08-10

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

  • kata-containersAzure Linux:3all versions · no fixed version listedand 5 other packages
  • rustAzure Linux:3all versions · fixed in 1.75.0-30
  • rustAzure Linux:3from 1.85.0 · fixed in 1.96.0-1
  • rust-tarUbuntu:Pro:22.04:LTSall versions · no fixed version listed
  • rust-tarUbuntu:Pro:20.04:LTSall versions · no fixed version listed
  • rust-tarUbuntu:26.10all versions · no fixed version listed
  • rust-tarUbuntu:26.04:LTSall versions · no fixed version listed
  • rust-tarUbuntu:24.04:LTSall versions · no fixed version listed

3 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-70622 Red Hat Product Security84 known affected

    tar: tar-rs: Information Disclosure via Symlink Escape

    ansible-automation-platform/automation-orchestrator-backend-rhel9 as a component of Ansible Automation Orchestrator 2026 · openshift-lightspeed/lightspeed-to-dataverse-exporter-rhel9 as a component of OpenShift Lightspeed · bootc.src as a component of Red Hat Enterprise Linux 10 · +81 more

Full record on NVD

Fix

  1. Workaround from the vendor Red Hat Product Security CVE-2026-70622 · 84 productsMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
  2. No fix available, says the vendor Red Hat Product Security CVE-2026-70622 · 83 productsAffected
  3. No fix planned, says the vendor Red Hat Product Security CVE-2026-70622 · 1 productWill not fix

Detection

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

Sources

  • NVDCVE recordread 2026-10-24
  • CISA-ADPSSVC decisionpoc2026-08-11
  • CNACVSS 4.07.1known since 2026-10-24
  • CNACVSS 3.16.5known since 2026-10-24
  • CNAweakness (CWE)CWE-59known since 2026-10-24
  • FIRST EPSSEPSS score0.5 %2026-11-08
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
2026-08-10
Last Modified
2026-10-24
NVD status
Deferred
GitHub Advisory
GHSA-c2qp-v5vm-7vxf

Frequently asked questions

What is CVE-2026-70622?

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.

Is CVE-2026-70622 actively exploited?

A proof-of-concept exploit exists for CVE-2026-70622, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-70622?

CVE-2026-70622 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

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Sources for this record