Disclosed vulnerability
CometJacking: one crafted URL turns Perplexity Comet into a data thief via the collection parameter
AIR-2025-0141 AIR record · 2025-10-perplexity-cometjacking
From the supporting source
An attacker only needs to get a user to open a crafted link, which can be sent via email, an extension, or a malicious site, and sensitive Comet data can be exposed, extracted, and exfiltrated.layerxsecurity.com
The record
Disclosed
2025-10-04
Vendor
Perplexity
Product
Perplexity Comet
Risk domain
Privacy › Data exfiltration channels
System type
Generative model
Who acted
Agent acted — Comet read memory and made the outbound exfiltration request
Attack surface
Browser agent
Autonomy level
Semi-autonomous
Initial vector
Malicious url query parameter injection
Impact type
Data exfiltration
Confidence
High
Submitted by
EAI Internal
Crosswalk
- OWASP Agentic Top 10 (2026)
- ASI02 – Tool Misuse and Exploitation
- MITRE ATLAS
- AML.T0024 – Exfiltration via AI Inference API
- NIST AI RMF
- MAP 4.2
- EU AI Act
- Article 10
- ISO/IEC
- TR 24028; 23894
- AIUC-1
- A. Data & Privacy
- Scope
- tool misuse
- Mitigation
- Monitor network traffic for anomalous patterns; Restrict egress destinations.
- Taxonomy
- Enkrypt AI agent risk taxonomy · Black-Box Red Teaming of Agentic AI: A Taxonomy-Driven Framework for Automated Risk Discovery
Blast radius
Comet users with Gmail/Calendar connectors who click one link
Capability abused
Defense & remediation
Recorded defense
Perplexity exfiltration guardrails on sensitive memory
Guardrail kinds
Unknown
Guardrail outcome
Silent
Fix shipped
none - Perplexity marked the 2025-08-27 report 'Not Applicable', stating it could not identify any security impact
Taxonomy & references
Curator notes
The 'collection' URL parameter is set to an unrecognized value, which makes the assistant read from memory instead of doing a live web search; the rest of the query string is the injected instruction. Base64 encoding of the output defeated the exfiltration filter. Disputed: Perplexity closed the report as Not Applicable.
Supporting sources
Cite as
Enkrypt AI. "CometJacking: one crafted URL turns Perplexity Comet into a data thief via the collection parameter". AIR, AIR-2025-0141. https://agentincident.vercel.app/i/AIR-2025-0141/ (accessed 2026-10-19).