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CVE-2026-35345

uutils coreutils tail Privileged Information Disclosure via Symlink Replacement Race

5.3 MediumFix available

A vulnerability in the tail utility of uutils coreutils allows for the exfiltration of sensitive file contents when using the --follow=name option. Unlike GNU tail, the uutils implementation continues to monitor a path after it has been replaced by a symbolic link, subsequently outputting the contents of the link's target. In environments where a privileged user (e.g., root) monitors a log directory, a local attacker with write access to that directory can replace a log file with a symlink to a sensitive system file (such as /etc/shadow), causing tail to disclose the contents of the sensitive file.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
Low
Availability
None

Exploit likelihood

0.10%Up 0.1 points since Apr 23, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.3

uutils coreutils tail Privileged Information Disclosure via Symlink Replacement Race

A vulnerability in the tail utility of uutils coreutils allows for the exfiltration of sensitive file contents when using the --follow=name option. Unlike GNU tail, the uutils implementation continues to monitor a path after it has been replaced by a symbolic link, subsequently outputting the contents of the link's target. In environments where a privileged user (e.g., root) monitors a log directory, a local attacker with write access to that directory can replace a log file with a symlink to a sensitive system file (such as /etc/shadow), causing tail to disclose the contents of the sensitive file.

Record
CVE-2026-35345
CVSS 3.1
5.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
Weakness
CWE-367, CWE-59
Updated
2026-11-02
EUVDEUVD-2026-24977 5.3

A vulnerability in the tail utility of uutils coreutils allows for the exfiltration of sensitive file contents when using the --follow=name option. Unlike GNU tail, the uutils implementation continues to monitor a path after it has been replaced by a symbolic link, subsequently outputting the contents of the link's target. In environments where a privileged user (e.g., root) monitors a log directory, a local attacker with write access to that directory can replace a log file with a symlink to a sensitive system file (such as /etc/shadow), causing tail to disclose the contents of the sensitive file.

Record
EUVD-2026-24977
CVSS 3.1
5.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-xf75-659h-cgg5 5.3

uutils coreutils has a Link Following Issue

A vulnerability in the tail utility of uutils coreutils allows for the exfiltration of sensitive file contents when using the --follow=name option. Unlike GNU tail, the uutils implementation continues to monitor a path after it has been replaced by a symbolic link, subsequently outputting the contents of the link's target. In environments where a privileged user (e.g., root) monitors a log directory, a local attacker with write access to that directory can replace a log file with a symlink to a sensitive system file (such as /etc/shadow), causing tail to disclose the contents of the sensitive file.

Record
GHSA-xf75-659h-cgg5
CVSS 3.1
5.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
Weakness
CWE-59
Updated
2026-11-02
NVD 5.3

A vulnerability in the tail utility of uutils coreutils allows for the exfiltration of sensitive file contents when using the --follow=name option. Unlike GNU tail, the uutils implementation continues to monitor a path after it has been replaced by a symbolic link, subsequently outputting the contents of the link's target. In environments where a privileged user (e.g., root) monitors a log directory, a local attacker with write access to that directory can replace a log file with a symlink to a sensitive system file (such as /etc/shadow), causing tail to disclose the contents of the sensitive file.

Record
CVE-2026-35345
CVSS 3.1
5.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
Weakness
CWE-59, CWE-367
Updated
2026-11-02
OSVDEBIAN-CVE-2026-35345 5.3

A vulnerability in the tail utility of uutils coreutils allows for the exfiltration of sensitive file contents when using the --follow=name option. Unlike GNU tail, the uutils implementation continues to monitor a path after it has been replaced by a symbolic link, subsequently outputting the contents of the link's target. In environments where a privileged user (e.g., root) monitors a log directory, a local attacker with write access to that directory can replace a log file with a symlink to a sensitive system file (such as /etc/shadow), causing tail to disclose the contents of the sensitive file.

Record
DEBIAN-CVE-2026-35345
CVSS 3.1
5.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
Updated
2026-11-02
OSVGHSA-xf75-659h-cgg5 5.3

uutils coreutils has a Link Following Issue

A vulnerability in the tail utility of uutils coreutils allows for the exfiltration of sensitive file contents when using the --follow=name option. Unlike GNU tail, the uutils implementation continues to monitor a path after it has been replaced by a symbolic link, subsequently outputting the contents of the link's target. In environments where a privileged user (e.g., root) monitors a log directory, a local attacker with write access to that directory can replace a log file with a symlink to a sensitive system file (such as /etc/shadow), causing tail to disclose the contents of the sensitive file.

Record
GHSA-xf75-659h-cgg5
CVSS 3.1
5.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
Weakness
CWE-59
Updated
2026-11-02
OSVUBUNTU-CVE-2026-35345 5.3

A vulnerability in the tail utility of uutils coreutils allows for the exfiltration of sensitive file contents when using the --follow=name option. Unlike GNU tail, the uutils implementation continues to monitor a path after it has been replaced by a symbolic link, subsequently outputting the contents of the link's target. In environments where a privileged user (e.g., root) monitors a log directory, a local attacker with write access to that directory can replace a log file with a symlink to a sensitive system file (such as /etc/shadow), causing tail to disclose the contents of the sensitive file.

Record
UBUNTU-CVE-2026-35345
CVSS 3.1
5.3 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
coreutils
crates.io
through 0.8.0 None known
rust-coreutils
Debian:12
All versions, plus listed versions
0.0.17-20.0.17-30.0.17-40.0.17-50.0.17-6
Show 39 moreShow less
0.0.19-10.0.19-20.0.19-30.0.20-10.0.21-10.0.22-10.0.23-10.0.23-20.0.23-30.0.24-10.0.24-20.0.26-10.0.26-20.0.26-30.0.26-40.0.26-50.0.27-10.0.27-20.0.27-30.0.30-10.0.30-20.0.30-30.0.30-3~exp10.0.30-40.10.0-10.11.0-10.11.0-20.12.0-10.6.0-10.7.0-10.8.0-10.8.0-20.8.0-30.8.0-40.8.0-50.8.0-60.9.0-10.9.0-20.9.0-3
None known
rust-coreutils
Debian:13
All versions, plus listed versions
0.0.30-20.0.30-30.0.30-3~exp10.0.30-40.10.0-1
Show 14 moreShow less
0.11.0-10.11.0-20.12.0-10.6.0-10.7.0-10.8.0-10.8.0-20.8.0-30.8.0-40.8.0-50.8.0-60.9.0-10.9.0-20.9.0-3
None known
rust-coreutils
Debian:14
before 0.10.0-1, plus listed versions
0.0.30-20.0.30-30.0.30-3~exp10.0.30-40.6.0-1
Show 10 moreShow less
0.7.0-10.8.0-10.8.0-20.8.0-30.8.0-40.8.0-50.8.0-60.9.0-10.9.0-20.9.0-3
0.10.0-1
rust-coreutils
Ubuntu:24.04:LTS
All versions, plus listed versions
0.0.20-10.0.22-10.0.23-10.0.23-20.0.23-30.0.24-10.0.24-2
None known
rust-coreutils
Ubuntu:25.10
All versions, plus listed versions
0.0.30-10.0.30-20.0.30-2ubuntu20.1.0-0ubuntu10.1.0+git20250711.2ba3a33-0ubuntu1
Show 11 moreShow less
0.1.0+git20250711.2ba3a33-0ubuntu20.1.0+git20250711.2ba3a33-0ubuntu30.1.0+git20250711.2ba3a33-0ubuntu40.1.0+git20250801.cf79675-0ubuntu10.1.0+git20250813.4af2a84-0ubuntu20.1.0+git20250813.4af2a84-0ubuntu40.1.0+git20250813.4af2a84-0ubuntu60.1.0+git20250813.4af2a84-0ubuntu70.2.2-0ubuntu10.2.2-0ubuntu20.2.2-0ubuntu2.1
None known
rust-coreutils
Ubuntu:26.10
All versions, plus listed versions
0.8.0-0ubuntu30.8.0-0ubuntu40.9.0-2ubuntu20.10.0-1ubuntu10.10.0-1ubuntu2
Show 5 moreShow less
0.10.0-1ubuntu30.11.0-2ubuntu10.11.0-2ubuntu20.12.0-1ubuntu10.12.0-1ubuntu2
None known
rust-coreutils
Ubuntu:26.04:LTS
All versions, plus listed versions
0.2.2-0ubuntu20.2.2-0ubuntu40.5.0-0ubuntu10.5.0-0ubuntu20.6.0-0ubuntu10.7.0-0ubuntu10.8.0-0ubuntu30.10.0-1ubuntu2~26.04.1
None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-35345 is a medium vulnerability (CVSS 5.3) in Uutils Coreutils, published April 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.10%, the 0th percentile. Fixed in rust-coreutils 0.10.0-1.

References

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