CVE-2026-56857: Red Hat Directory traversal via Windows junction handling
This Red Hat advisory covers CVE-2026-56857. Related products: OpenShift Developer Tools and Services, OpenShift Pipelines, OpenShift Serverless.
Key facts
- Vendor rating
- Low, CVSS 3.3
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H· base score 9.8, scored by CISA-ADPAttack vector: network. Attack complexity: low. Privileges required: none. User interaction: none. Scope: unchanged. Confidentiality impact: high. Integrity impact: high. Availability impact: high.- Weakness
- CWE-1386: Insecure Operation on Windows Junction / Mount Point
- EPSS
- 0.55% chance of exploitation in the next 30 days (46th percentile). FIRST EPSS, .
- CISA SSVC
- Exploitation: none observed. Automatable: yes. Technical impact: total. CISA, .
- CISA KEV
- Not listed (catalogue checked )
- Source published
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Related products & platforms
Description
Directory traversal via Windows junction handling. Red Hat rates this low (CVSS 3.3).
Weakness: CWE-59.
Affected products named by the advisory: OpenShift Developer Tools and Services; OpenShift Pipelines; OpenShift Serverless; OpenShift Service Mesh 3; and 32 more.
Affected products named by the advisory: Red Hat AMQ Clients; Red Hat Ansible Automation Platform 2; Red Hat Certification Program for Red Hat Enterprise Linux 9; Red Hat Edge Manager 1; and 28 more.
Text from the source record.
End-of-life dates for Red Hat Enterprise Linux
CVE-2026-56857 in other vendors' advisories
- Veeam: KB4825
More Red Hat Linux advisories
CVE-2026-111497Oct 22, 2026Out-of-Bounds Write in Google Brotli DecoderCVE-2026-109619Oct 21, 2026fatal error handling retains stale request state leading to use-after-freeCVE-2026-109618Oct 21, 2026OOM bailout during request parsing leads to memory corruption and RCECVE-2026-48710May 26, 2026Security restriction bypass via malformed HTTP Host headerCVE-2026-123158Nov 5, 2026Password authentication bypass via password hash misinterpretationCVE-2026-119977Oct 31, 2026Arbitrary code execution via predictable upgrade staging paths
Get an email when Red Hat RHEL & SELinux publishes the next one.
See Red Hat RHEL & SELinux's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).
iPhone and Android apps · New on the App Store
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.
