How severe is CVE-2026-91203?

CVE-2026-91203 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-91203 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.

How do I fix CVE-2026-91203?

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

When was CVE-2026-91203 published?

CVE-2026-91203 was published on 2026-09-18 and last updated on 2026-09-22.

CVE-2026-91203

CVE-2026-91203 is a medium-severity vulnerability with a CVSS 3.x base score of 6.0. 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-363.

Key facts

Severity: Medium (CVSS 3.x base score 6.0)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-363
Published: 2026-09-18
Last modified: 2026-09-22

Description

A flaw was found in cockpit-files. This vulnerability allows a local attacker to exploit a timing issue, known as a symlink race condition, during privileged file operations such as changing file ownership or permissions. By manipulating directory entries and winning this race, the attacker can redirect these operations to unintended files. This could lead to unauthorized changes in file ownership and permissions on arbitrary files, potentially compromising system integrity and availability by altering system or application states or rendering services unusable.

Frequently asked questions

What is CVE-2026-91203?: A flaw was found in cockpit-files. This vulnerability allows a local attacker to exploit a timing issue, known as a symlink race condition, during privileged file operations such as changing file ownership or permissions. By manipulating directory entries and winning this race, the attacker can redirect these operations to unintended files. This could lead to unauthorized changes in file ownership and permissions on arbitrary files, potentially compromising system integrity and availability by altering system or application states or rendering services unusable.
How severe is CVE-2026-91203?: CVE-2026-91203 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-91203 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.
How do I fix CVE-2026-91203?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-91203 published?: CVE-2026-91203 was published on 2026-09-18 and last updated on 2026-09-22.

References

Other CWE-363 vulnerabilities

CVE-2025-13492 — High (CVSS 7.0): A potential security vulnerability has been identified in HP Image Assistant for versions prior to 5.3.3. The…
CVE-2026-71125 — Medium (CVSS 6.1): Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The supported version…
CVE-2026-91205 — Medium (CVSS 6.0): A flaw was found in cockpit-files. A local unprivileged attacker can exploit a race condition during directory creation…

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