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.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:2714-1 advisory.

    This update for tar fixes the following issues

    Security fixes:

    - CVE-2026-5704: crafted archives can be used to to hide file injection (bsc#1261900).

    Other fixes:

    - Fix tar changing dir permissions temporarily even when using --no-overwrite-dir.
    - Fix --dereference/-h not working properly after CVE-2025-45582 fix (bsc#1265450).
    - Fix extraction failure for paths like 'a/./b' caused by the gnulib openat2      implementation (bsc#1267189).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES16 / SLES_SAP16 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:22377-1 advisory.

    This update for tar fixes the following issues

    - CVE-2026-5704: crafted archives can be used to to hide file injection (bsc#1261900).
    - Fix --dereference/-h not working properly after CVE-2025-45582 fix (bsc#1265450).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21070-1 advisory.

    This update for tar fixes the following issues

    - CVE-2026-5704: crafted archives can be used to to hide file injection (bsc#1261900).
    - Fix --dereference/-h not working properly after CVE-2025-45582 fix (bsc#1265450).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8477-1 advisory.

    It was discovered that tar incorrectly handled certain crafted archive files. An attacker could possibly     use this to inject hidden files with attacker-controlled content, bypassing pre-extraction inspection     mechanisms.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-5704)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
324857	SUSE SLED15 / SLES15 Security Update : tar (SUSE-SU-2026:2714-1)	Nessus	SuSE Local Security Checks	medium
324846	SUSE SLES16 Security Update : tar (SUSE-SU-2026:22377-1)	Nessus	SuSE Local Security Checks	medium
324068	openSUSE 16 Security Update : tar (openSUSE-SU-2026:21070-1)	Nessus	SuSE Local Security Checks	medium
322951	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : tar vulnerability (USN-8477-1)	Nessus	Ubuntu Local Security Checks	medium
305082	Linux Distros Unpatched Vulnerability : CVE-2026-5704	Nessus	Misc.	medium

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CVE-2026-5704

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