How severe is CVE-2026-35359?

CVE-2026-35359 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-35359 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35359?

CVE-2026-35359 affects Uutils Coreutils. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35359?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-35359 have an EU (EUVD) identifier?

Yes. CVE-2026-35359 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25000.

When was CVE-2026-35359 published?

CVE-2026-35359 was published on 2026-04-22 and last updated on 2026-06-17.

CVE-2026-35359

CVE-2026-35359 is a medium-severity vulnerability in Uutils Coreutils with a CVSS 3.x base score of 4.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-59.

Key facts

Severity: Medium (CVSS 3.x base score 4.7)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25000
Weakness: CWE-59
Affected product: Uutils Coreutils
Published: 2026-04-22
Last modified: 2026-06-17

Description

A Time-of-Check to Time-of-Use (TOCTOU) vulnerability in the cp utility of uutils coreutils allows an attacker to bypass no-dereference intent. The utility checks if a source path is a symbolic link using path-based metadata but subsequently opens it without the O_NOFOLLOW flag. An attacker with concurrent write access can swap a regular file for a symbolic link during this window, causing a privileged cp process to copy the contents of arbitrary sensitive files into a destination controlled by the attacker.

Frequently asked questions

What is CVE-2026-35359?: A Time-of-Check to Time-of-Use (TOCTOU) vulnerability in the cp utility of uutils coreutils allows an attacker to bypass no-dereference intent. The utility checks if a source path is a symbolic link using path-based metadata but subsequently opens it without the O_NOFOLLOW flag. An attacker with concurrent write access can swap a regular file for a symbolic link during this window, causing a privileged cp process to copy the contents of arbitrary sensitive files into a destination controlled by the attacker.
How severe is CVE-2026-35359?: CVE-2026-35359 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-35359 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35359?: CVE-2026-35359 affects Uutils Coreutils. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35359?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-35359 have an EU (EUVD) identifier?: Yes. CVE-2026-35359 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25000.
When was CVE-2026-35359 published?: CVE-2026-35359 was published on 2026-04-22 and last updated on 2026-06-17.

References

https://github.com/uutils/coreutils/issues/10017

Affected products (1)

cpe:2.3:a:uutils:coreutils:-:*:*:*:*:rust:*:*

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