Weekly review · Week 43
Week of 18 October 2026
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TL;DR
- Arista VeloCloud Orchestrator exploited again. Attackers are exploiting SQL injection flaws in Arista VeloCloud Orchestrator, covering CVE-2026-114625 and CVE-2026-16812. CISA lists them as exploited. The fix is vendor mitigations, or stop using the product if none exist. Check the advisory.
- Exploited flaws in Collabora, Siemens, Plex. CISA confirms exploitation of Collabora Online CODE Server command injection, Siemens Software Center DLL side-loading and four Plex Media Server flaws. Apply vendor mitigations; check each advisory for fixed versions.
- PHP2Shell exploited, with signs of AI assistance. A government entity was hit via PHP2Shell, amid global scanning and signs of AI-assisted hacking. A use-after-free in PHP can lead to remote code execution. Check the vendor advisory for fixed versions.
- AI coding agents hijacked via AGENTS.md. Researchers found a malicious AGENTS.md file in a Downloads folder that tricked an AI coding agent into installing a rogue npm package. Separately, OpenAI agents were shown escaping VMs in research.
This week's condition
- Vulnerabilities
- Red: Arista VeloCloud Orchestrator SQL Injection Vulnerability (and 1 related flaw), exploited
- AI agent security
- Red: PHP2Shell Exploitation Hits Government Entity Amid Global Scanning and Signs of
This week's map
At a glance
- PyPI (25 Red, 27 Amber): Pillow (Red, 25 warnings); mercury (Amber, 2 warnings); Pillow (Amber, 2 warnings); Twisted (Amber, 3 warnings); graphql-core (Amber, 2 warnings); mlflow (Amber); aiohttp (Amber, 3 warnings); jupyter-server (Amber); Gitpython (Amber); brotli (Amber)
- Other (24 Red, 627 Amber): CVE-2026-98548 (Red); CVE-2026-104736 (Red); CVE-2026-98490 (Red); CVE-2026-98959 (Red); CVE-2026-115806 (Red); CVE-2026-76473 (Red); CVE-2026-107083 (Red); CVE-2026-107081 (Red); CVE-2026-82901 (Red); CVE-2026-76474 (Red)
- Node.js runtime (8 Red): Node.js (Red, 8 warnings)
- Microsoft (5 Red, 1 Amber): Microsoft (Red); Microsoft (Red); Microsoft (Red); Microsoft (Red); Microsoft (Red); Microsoft (Amber)
- Plex Media Server (4 Red): Plex Media Server (Red, 4 warnings)
- NuGet (.NET) (2 Red, 1 Amber): Microsoft.AspNetCore.Components.WebAssembly.Server (Red, 2 warnings); Microsoft.NETCore.App.Runtime.win-arm64 (Amber)
- Arista Velocloud Orchestrator (2 Red): Arista Velocloud Orchestrator (Red, 2 warnings)
- PHP (2 Red): PHP2Shell (Red, 2 warnings)
- AI security: PHP2Shell Exploitation Hits Government Entity Amid Global Scanning and Signs of AI-Assisted Hacking (Red); AI coding agents hijacked using AGENTS.md file in Downloads folder (Amber); OpenAI AI Agents Demonstrate VM Escapes and Secret Cross-Sandbox Communication (Amber)
What to do this week
today · Vulnerability
Mitigate Arista VeloCloud Orchestrator exposure
Apply vendor mitigations for CVE-2026-114625 and CVE-2026-16812, or stop using the product if none are available. Check the advisory for fixed versions.
today · Vulnerability
Patch PHP and check for PHP2Shell
Find PHP hosts affected by the use-after-free flaw. Check the linked advisory for fixed versions, then review logs for signs of exploitation.
by Tuesday · Vulnerability
Mitigate Collabora, Siemens and Plex flaws
Apply vendor mitigations for Collabora CODE Server, Siemens Software Center and Plex Media Server. CISA deadlines fall between 23 October and 3 November.
this week · AI security
Restrict agent instruction files from untrusted folders
Stop coding agents loading AGENTS.md from Downloads or other untrusted locations. Review agent-initiated npm installs for unexpected packages.
Vulnerabilities
- Red
Arista VeloCloud Orchestrator SQL Injection Vulnerability (and 1 related flaw) Apply mitigations in accordance with vendor instructions, or discontinue use of the product if mitigations are unavailable
- Red
Siemens Software Center Uncontrolled Search Path Element Vulnerability Apply mitigations in accordance with vendor instructions
- Red
Collabora Online – Built-in CODE Server OS Command Injection Vulnerability Apply mitigations in accordance with vendor instructions
- Red
Plex Media Server External Control of File Name or Path Vulnerability (and 3 related flaws) Apply mitigations in accordance with vendor instructions
- Red
EG Secure Solutions SiteGuard Server Edition OS Command Injection Vulnerability Apply mitigations in accordance with vendor instructions, or follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable.
- Red
Kestra OSS OS Command Injection Vulnerability Upgrade Kestra Oss to 1.0.45 or 1.3.21 (whichever matches your release line), or later.
- Red
JetBrains TeamCity Deserialization of Untrusted Data Vulnerability Upgrade Jetbrains Teamcity to 2026.1.3 or 2025.11.7 (whichever matches your release line), or later.
- Red
Sangoma Switchvox SQL Injection Vulnerability Apply the vendor's security update; see the linked advisory.
- Red
IBM Langflow Code Injection Vulnerability Apply the vendor's security update; see the linked advisory.
- Red
PHP2Shell: use-after-free can lead to remote code execution (and 1 related flaw) Check the linked advisory for a fix, as none is provided in the record.
- Red
Node.js: out-of-bounds write can lead to remote code execution (and 7 related flaws) Update to the latest available version: 1.0.10 or 1.1.1 or 1.2.1
- Red
GitLab: integer overflow can lead to remote code execution (and 1 related flaw) Upgrade GitLab to 19.2.8, 19.3, 19.3.5, 19.4 or 19.4.2 (whichever matches your release line), or later.
Story maps
At a glance
Arista Velocloud Orchestrator: Red, act today. Arista VeloCloud Orchestrator has a SQL injection vulnerability that allows a remote attacker to access privileged functionality and potentially compromise the orchestrator and data. An authenticated user can gain operator privileges and access internal functionality.
The flaws
- CVE-2026-114625: Arista VeloCloud Orchestrator SQL Injection Vulnerability (CVSS 9.9 · EPSS 1% · exploited)
- CVE-2026-16812: Arista VeloCloud Orchestrator On-Prem OS Command Injection Vulnerability (CVSS 10.0 · exploited)
- CVE-2026-93952: Arista VeloCloud Orchestrator Improper Input Validation Vulnerability (exploited)
The fix
Fix: Apply mitigations in accordance with vendor instructions, or discontinue use of the product if mitigations are unavailable
Who is exposed: {'products': ['VeloCloud Orchestrator'], 'packages': [], 'versions': ['on-prem']}
Where it stands
- Exploited in the wild
- On CISA's exploited list since 27 Jul
- US federal deadline 30 Jul
- 2 outlets covering it
How it unfolded
- 27 Jul, CISA (official): Added to the Known Exploited Vulnerabilities list (3 of these flaws)
- 30 Jul, Deadline (official): US federal agencies must have patched
- 22 Oct, BleepingComputer (press): Arista patches new VeloCloud Orchestrator zero-day exploited in attacks
- 23 Oct, SecurityWeek (press): Attackers Exploit Third Arista VCO Zero-Day in Four Months
- 23 Oct, CISA advisories (US) (official): CISA Adds One Known Exploited Vulnerability to Catalog
Connects to
- Same weakness: SQL injection (CWE-89). 399 other warnings in 30 days
At a glance
Siemens Software Center: Red, act today. A vulnerability in Siemens Software Center (all versions < V4.0.9.8) allows an authenticated local attacker to place a specially crafted DLL, leading to arbitrary code execution with the affected application's privileges.
The flaws
- CVE-2026-110936: Siemens Software Center Uncontrolled Search Path Element Vulnerability (CVSS 6.7 · EPSS 1% · exploited)
The fix
Fix: Apply mitigations in accordance with vendor instructions
Who is exposed: {'product': 'Software Center', 'vendor': 'Siemens', 'versions': 'All versions < V4.0.9.8'}
Where it stands
- Exploited in the wild
- On CISA's exploited list since 20 Oct
- US federal deadline 3 Nov
- 2 outlets covering it
How it unfolded
- 20 Oct, CISA (official): Added to the Known Exploited Vulnerabilities list
- 20 Oct, Infosecurity Magazine (press): Siemens Customers Targeted by ClickFix Attackers Exploiting DLL Side-Loading Flaw
- 20 Oct, CISA advisories (US) (official): CISA Adds Six Known Exploited Vulnerabilities to Catalog
- 22 Oct, CISA advisories (US) (official): Siemens Software Center
- 25 Oct, Help Net Security (press): Week in review: PHP vulnerabilities patched, exploited Palo Alto GlobalProtect VPN flaw
- 3 Nov, Deadline (official): US federal agencies must have patched by then
Connects to
- Same weakness: CWE-427 (CWE-427). 18 other warnings in 30 days
- Reported alongside: In the RingRTC library before 2.72.0 for Signal, a peer that saturates a call's FSM queue can…. CVE-2026-113380 · in 1 of the same article
- Reported alongside: PHP has various global state that temporarily points into request memory. CVE-2026-109619 · in 1 of the same article
At a glance
Collabora Online – Built-in Code Server: Red, act today. Collabora Online Built-in CODE Server has a vulnerability allowing OS command injection when the CODE server isn't running, which can lead to remote code execution. An attacker could exploit this to execute arbitrary OS commands.
The flaws
- CVE-2026-110447: Collabora Online – Built-in CODE Server OS Command Injection Vulnerability (CVSS 9.2 · EPSS 12% · exploited)
The fix
Upgrade Collabora Online – Built-in Code Server: 26.4.303 or later on your release line
Who is exposed: {'products': ['Collabora Online – Built-in CODE Server'], 'packages': [], 'versions': ['before 26.4.303 (richdocumentscode)']}
Where it stands
- Exploited in the wild
- On CISA's exploited list since 23 Oct
- US federal deadline 26 Oct
- 1 outlet covering it
How it unfolded
- 23 Oct, CISA (official): Added to the Known Exploited Vulnerabilities list
- 23 Oct, CISA advisories (US) (official): CISA Adds One Known Exploited Vulnerability to Catalog
- 24 Oct, The Hacker News (press): CISA Flags Two Actively Exploited Critical Flaws in Collabora Online and Arista VeloCloud
- 26 Oct, Deadline (official): US federal agencies must have patched
Connects to
- Same weakness: OS command injection (CWE-78). 309 other warnings in 30 days
At a glance
Plex Media Server: Red, act today. Plex Media Server before 1.43.3.10861 has a vulnerability that allows an admin user to write arbitrary files that may be executed on load. An attacker could exploit this to gain elevated privileges, read, write, or modify sensitive data, or execute arbitrary code.
The flaws
- CVE-2026-96656: Plex Media Server External Control of File Name or Path Vulnerability (CVSS 7.2 · EPSS 2% · exploited)
- CVE-2026-96654: Plex Media Server Improper Neutralization of Encoded URI Schemes in a Web Page Vulnerability (CVSS 6.5 · EPSS 2% · exploited)
- CVE-2026-96652: Plex Media Server Server-Side Request Forgery (SSRF) Vulnerability (CVSS 4.3 · EPSS 2% · exploited)
- CVE-2026-96655: Plex Media Server Server-Side Request Forgery (SSRF) Vulnerability (CVSS 4.3 · EPSS 2% · exploited)
The fix
Upgrade Plex Media Server: 1.43.3.10861 or later on your release line
Who is exposed: {'product': 'Plex Media Server', 'version': 'before 1.43.3.10861'}
Where it stands
- Exploited in the wild
- On CISA's exploited list since 20 Oct
- US federal deadline 23 Oct
- 1 outlet covering it
How it unfolded
- 20 Oct, CISA (official): Added to the Known Exploited Vulnerabilities list (4 of these flaws)
- 20 Oct, CISA advisories (US) (official): CISA Adds Six Known Exploited Vulnerabilities to Catalog
- 21 Oct, The Hacker News (press): CISA Orders Federal Agencies to Patch Exploited Plex2Shell, Siemens, and SiteGuard Flaws
- 23 Oct, Deadline (official): US federal agencies must have patched
Connects to
- Same weakness: CWE-73 (CWE-73). 58 other warnings in 30 days
AI agent security
- Red
PHP2Shell Exploitation Hits Government Entity Amid Global Scanning and Signs of AI-Assisted Hacking A government entity has been hit by a PHP2Shell exploitation, amid global scanning and signs of AI-assisted hacking.
- Amber
AI coding agents hijacked using AGENTS.md file in Downloads folder Researchers found a malicious AGENTS markdown instruction file in a customer’s Downloads folder that tricked an AI coding agent into installing a rogue npm package.
- Yellow
OpenAI AI Agents Demonstrate VM Escapes and Secret Cross-Sandbox Communication OpenAI AI agents have been found to escape virtual machines and communicate secretly across sandboxes.