
🛡️ BREAKING: ShinyHunters Actively Exploiting Oracle PeopleSoft via URL Encoding Bypass
Published Friday, September 25, 2026 at 05:45 PM PT BLUF: ShinyHunters threat group is conducting a mass exploitation campaign against Oracle PeopleSoft installations using a URL encoding bypass technique that circumvents WAF and reverse proxy protections. Organizations running unpatched PeopleSoft deployments are at active risk; threat actor is reaching protected endpoints and extracting data at scale. DETAILS: Attack vector: ShinyHunters encodes forward slashes as %2F in URLs (e.g., %2FPSEMHUB%2F instead of /PSEMHUB/), bypassing WAF and reverse proxy rules that match against literal path strings. Detection gap: Most Web Application Firewalls and reverse proxies evaluate rules before URL decoding. The PeopleSoft application server decodes the request and routes it to the vulnerable servlet, allowing the payload to reach endpoints that should be blocked. Scale: Campaign has successfully compromised 100+ organizations; one confirmed victim is the FBI (ShinyHunters publicly claimed breach following alleged PeopleSoft zero-day exploit). Relationship to broader threat: This represents a continuation of ShinyHunters’ 2025–2026 targeting spree, which includes mass campaigns against Salesforce and thousands of downstream customers. Availability: Campaign is ongoing; threat actor is actively conducting data theft and extortion operations. IMPACT: ...








