CVE-2026-58744
In multiple locations, there is a possible escalation of privilege due to improper input validation. This could lead to local escalation of
CVSS
7.8
High
EPSS
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KEV
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Exploit Today
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0-100
Published: Sep 15, 2026 · Last modified: Sep 16, 2026 · CWE-20
Not enough EPSS history yet.
In multiple locations, there is a possible escalation of privilege due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
CVECVSSEPSSKEVRExploitTitleMod.
CVE-2026-880648.8 HIG—
———Backstage is an open framework for building developer portals. Prior to 1.14.6 and from 1.15.0 until 1.15.4, the @backstage/plugin-techdocs-node package insufficiently validates mkdocs.yml supplied by an authenticated user who can register or modify a TechDocs source. Unsafe Python YAML tags, markdown_extensions names and configuration, theme options, and extra_templates values can reach the documentation generator and cause unintended code execution. The resulting impact is limited to the files, credentials, network access, and other resources available to the TechDocs backend or build container. This issue is fixed in versions 1.14.6 and 1.15.4.4hCVE-2026-771906.5 MED—
———On affected platforms running Arista EOS, an unauthenticated attacker who is network-adjacent to the switch and able to connect to a device with PIM Sparse Mode and MLAG configured, can send malformed messages that cause the Pimsm agent to terminate unexpectedly. The Pimsm agent is automatically restarted, but repeated attacks can cause the agent to restart continuously, resulting in a sustained denial of service.2hCVE-2026-734454.9 MED—
———On affected platforms running Arista EOS, an issue with the gRPC Network Security Interface (gNSI) Authz Rotate RPC may cause an incorrect Authz policy which was uploaded in the ongoing RPC stream to become active. This does not affect Bootz.
This issue was discovered internally by Arista and the company is not aware of any malicious uses of this issue in customer networks.2hCVE-2026-864755.3 MED—
———The Appointment Hour Booking WordPress plugin before 1.5.95 does not check every appointment in a booking submission against the capacity configured for its own slot, allowing unauthenticated visitors to take slots that are already fully booked.2hCVE-2026-917389.6 CRI—
———Improper input validation in ANGLE in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)9hCVE-2026-196556.5 MED—
———On affected platforms running Arista EOS with Dynamic Host Configuration Protocol (DHCP) relay/snooping configured with the information option (Option 82), or with the DHCP server configured with match criteria based on the information option, an unauthenticated attacker connected to a client-facing VLAN(s) where the relay is configured can send a specially crafted packet that causes the DHCP Relay service to restart.2h