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CVE-2026-5704: A flaw was found in tar

37
Routine
MEDIUM 5.0WATCHLISTMITIGATEMITIGATEMITIGATE

CVE-2026-5704 is a medium-severity flaw (CVSS 5.0) affecting tar, hardened images, enterprise linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in tar. A remote attacker could exploit this vulnerability by crafting a malicious archive, leading to hidden file injection with fully attacker-controlled content. This bypasses pre-extraction inspection mechanisms, potentially allowing an attacker to introduce malicious files onto a system without detection.

Why this priority

  • Public exploit reference
  • On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score5.0 (Medium)
Attack vectorLocal
Attack complexityLow
Privileges neededLow
User interactionRequired
EPSS exploit chance0.4% (top 63%)
CISA exploited listNo
WeaknessCWE-434
Published2026-04-06
Last modified2026-10-26
Publisher (CNA): Red Hat, Inc. · Vendor: gnu · redhat

Share: LinkedIn · X · Reddit

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

gnu tar MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy tar || rpm -q tar || tar --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
redhat hardened images MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy hardened-images || rpm -q hardened-images || hardened-images --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
redhat enterprise linux MITIGATE
Affected: 6.0 · 7.0 · 8.0 · 9.0 · 10.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 6.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-5704?

tar: mitigate or apply the listed mitigation; hardened images: mitigate or apply the listed mitigation; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-5704 being exploited?

CVE-2026-5704 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-5704 affect?

CVE-2026-5704 affects tar, hardened images, enterprise linux. Severity is medium (CVSS 5.0). A flaw was found in tar. A remote attacker could exploit this vulnerability by crafting a malicious archive, leading to hidden file injection with fully attacker-controlled content. This bypasses pre-extraction inspection mechanisms, potent

How urgent is CVE-2026-5704?

Priority 37/100. Public exploit reference; On your watchlist

Related CVEs

References

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