Authentication-Bypass
AA26-194A: NSA, CISA, FBI Warn Russian FSB Center 16 Is Harvesting Router Configs via Weak SNMP and an 18-Year-Old Cisco CSRF Bug
A 19-agency joint advisory (AA26-194A) details a years-long Russian FSB Center 16 campaign that scans for default SNMP community strings and an 18-year-old Cisco IOS CSRF flaw (CVE-2008-4128, now in CISA KEV) to exfiltrate router configs and pivot into critical infrastructure.
CVE-2026-58658: GPUStack Worker Ports Leaked LLM Prompts and Completions With No Authentication
GPUStack, an open-source GPU cluster manager for vLLM/SGLang/TensorRT-LLM inference, shipped worker debug and log-streaming endpoints with zero authentication — letting anyone who can reach the worker port read live prompts, completions, and memory profiles.
Langflow Hit With Its Second CISA KEV Entry in Four Months: CVE-2026-55255 IDOR Under Active Exploitation
CISA adds Langflow CVE-2026-55255, an IDOR letting authenticated attackers hijack other users' AI workflows, to its KEV catalog after Sysdig caught in-the-wild exploitation chained with secret harvesting.
Ubiquiti's Bulletin 066: A CVSS 10.0 in UniFi Connect Leads 25 Flaws Across the Whole UniFi Line
Ubiquiti Security Advisory Bulletin 066 discloses 25 vulnerabilities across UniFi Connect, Talk, Access, Protect, and UniFi OS — headlined by CVE-2026-50746, a CVSS 10.0 unauthenticated command injection reachable on ~100,000 internet-facing endpoints.
CVE-2026-11405: Undocumented Admin Backdoor in Tenda Router Firmware, No Patch Available
CERT/CC disclosed a hardcoded backdoor password mechanism in Tenda router firmware that grants full admin access regardless of the real password — Tenda has not responded to coordination attempts since May, and there is no patch.
Gitea CVE-2026-20896: Docker Images Trusted a Spoofable Header for Admin Access, Now Under Active Probing
Gitea's official Docker images shipped with reverse-proxy header trust wide open by default, letting anyone who can reach the port impersonate any user including an admin — Sysdig has now caught the first in-the-wild probing, 13 days after disclosure.
SimpleHelp OIDC Auth Bypass (CVE-2026-48558) Under Active Exploitation, Deploying Djinn Stealer Against Dev Credentials
A critical unsigned-token flaw in SimpleHelp RMM's OIDC login is being exploited to plant a cross-platform infostealer that hunts for cloud, source-control, and AI-assistant credentials.
JADEPUFFER: First Documented Ransomware Attack Run End-to-End by an AI Agent
Sysdig documents JADEPUFFER, an LLM-driven agent that autonomously exploited a year-old Langflow RCE (CVE-2025-3248) to breach, pivot, and encrypt a production database with zero human operator input.
Oracle E-Business Suite Payments Flaw Under Active Exploitation Before Patch Window Closed
CVE-2026-46817, a CVSS 9.8 unauthenticated takeover flaw in Oracle E-Business Suite's Payments module, is being mass-exploited via the ibytransmit endpoint — patched in May but hit in the wild before any public PoC existed.
Ubiquiti UniFi OS Server Triple-CVE Chain Enables Unauthenticated Root RCE
Three max-severity CVEs (2026-34908/09/10) in UniFi OS Server chain from an Nginx auth bypass to root command injection — CISA added all three to KEV on June 23 amid Mirai/Gaafgyt botnet exploitation.
A Zero-Length Compare and 27 Years: OpenBSD's PAP Authentication Bypass (CVE-2026-55706)
CVE-2026-55706 is a 27-year-old authentication bypass in OpenBSD's sppp(4) PAP handler. An attacker-controlled compare length means empty credentials produce a PAP_ACK — and an oversized one leaks kernel heap. Full details and a working PoC are public.
CVE-2026-50751: Check Point VPN Auth Bypass Exploited by Qilin — IKEv1 Sessions Without a Password
Check Point confirmed active exploitation of CVE-2026-50751, a CVSS 9.3 authentication bypass in Remote Access VPN and Mobile Access deployments running deprecated IKEv1. Attackers establish VPN sessions without a valid password; one case is tied to a Qilin ransomware affiliate. Earliest exploitation traces to May 7.
CVE-2026-0257: Palo Alto GlobalProtect Auth Bypass Now Exploited — Unauthorized VPN Access Into Your Network
Palo Alto confirmed active exploitation of CVE-2026-0257, a CVSS 7.8 GlobalProtect authentication bypass that lets attackers establish unauthorized VPN sessions into the internal network. Rapid7 traced exploitation back to May 17. CISA KEV deadline is June 1.
BadHost (CVE-2026-48710): A Forged Host Header Walks Past Auth in Every Starlette App
BadHost (CVE-2026-48710) is a Host-header authentication bypass in Starlette before 1.0.1. One malformed header makes request.url.path lie to your middleware — unlocking protected routes on FastAPI, vLLM, LiteLLM, and MCP servers without credentials.
Cisco Secure Workload CVE-2026-20223: Unauthenticated API Flaw Hands Over Site Admin
A CVSS 10.0 flaw in Cisco Secure Workload lets unauthenticated attackers reach internal REST APIs with Site Admin privileges across tenant boundaries. No workarounds — patch now.
Sentry CVE-2026-42354: Incomplete Fix Reopens SAML SSO Account Takeover
Sentry self-hosted is vulnerable again to cross-organization SAML account takeover, three months after CVE-2026-27197 was supposedly patched. Upgrade to 26.4.1.
MOVEit Automation Hit With CVSS 9.8 Auth Bypass: CVE-2026-4670 Grants Admin Without Credentials
Progress patches a 9.8-severity authentication bypass plus a 7.7 privilege escalation in MOVEit Automation; Airbus reported both, no in-the-wild exploitation yet but the MFT family's track record demands immediate patching.
cPanel & WHM CVE-2026-41940: Critical Auth Bypass Triggers Global Hosting Lockdown
An unauthenticated CRLF-injection auth bypass in cPanel & WHM (CVSS 9.8) sent every major hosting provider into emergency port-blocking mode within hours of disclosure. All supported release tracks are affected.
Quest KACE SMA CVE-2025-32975: CVSS 10.0 SSO Auth Bypass Added to CISA KEV as Admin Takeover Campaign Continues
CISA added CVE-2025-32975 — a CVSS 10.0 SSO authentication bypass in Quest KACE Systems Management Appliance — to the KEV catalog on April 20, 2026. Federal agencies must patch by May 4. Exploitation has been in progress since March.
Two Critical FortiSandbox Flaws Let Unauthenticated Attackers Execute Commands and Bypass Auth
Fortinet discloses CVE-2026-39808 and CVE-2026-39813 — two CVSS 9.1 flaws in FortiSandbox allowing unauthenticated command execution and authentication bypass via crafted HTTP requests.