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.
CVE-2026-91203
MEDIUMPre-NVD 6.06.0—Trending — 3 sources updated this week
EchelonGraph scoreHIGH confidence
Score 6.0 from GitHub Security Advisory published 2026-09-18. a secondary CVSS source baseline 6.0; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
6.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 6.0Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.0
- EG Score
- 6.0(high)
- EG Risk
- 32(Track)EG Risk 32/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity60% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
Published
September 18, 2026
Last Modified
September 18, 2026
Advisory Details (2)
Auto-updated Sep 18, 2026Patch available. Sources: redhat.
redhat
2465632 – (CVE-2026-91203) CVE-2026-91203 cockpit-files: cockpit-files: Arbitrary file ownership and permission modification via symlink race condition
https://bugzilla.redhat.com/show_bug.cgi?id=2465632redhat Patch Available
CVE-2026-91203 - Red Hat Customer Portal
Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a
https://access.redhat.com/security/cve/CVE-2026-91203Vendor Advisories for CVE-2026-91203(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 7× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-18 23:17 UTCEG score recompute
- 2026-09-18 23:17 UTCGHSA enrichment
- 2026-09-18 22:43 UTCEG score recompute
- 2026-09-18 22:43 UTCGHSA enrichment
- 2026-09-18 20:31 UTCEG score recompute
- 2026-09-18 19:29 UTCEG score recompute
- 2026-09-18 19:29 UTCMITRE cvelistV5first tracked
Frequently asked(4)
What is CVE-2026-91203?
CVE-2026-91203 is a medium vulnerability published on September 18, 2026. 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…
When was CVE-2026-91203 disclosed?
CVE-2026-91203 was first published in the National Vulnerability Database on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-91203?
CVE-2026-91203 has a CVSS v3 base score of 6.0 (NVD).
How do I remediate CVE-2026-91203?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91203, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-91203
Is Your Infrastructure Affected by CVE-2026-91203?
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