Detections
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Echo: tar: security update to 1.35+dfsg-3.1+e5

medium Tenable Cloud Security Plugin ID 459870

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - A flaw was found in GNU tar. When extracting an archive with the --one-top-level option, hardlink targets
 are not confined to the designated top-level directory and may resolve relative to the extraction working
 directory. A crafted archive can create hardlinks that escape the intended boundary and, when combined
 with a preexisting symbolic link under the working directory, may allow writing outside that boundary
 during a single extraction. (CVE-2026-18508)

Solution

Update the tar library and its related packages to version 1.35+dfsg-3.1+e5 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-18508

Plugin Details

Severity: Medium

ID: 459870

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 2.1

Percentile: 7.96

CVSS v2

Risk Factor: Low

Base Score: 3.6

Temporal Score: 2.7

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2026-18508

CVSS v3

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.9

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 8/4/2026

Vulnerability Publication Date: 8/3/2026

Reference Information

CVE: CVE-2026-18508