Blind SSRF via unvalidated multimodal tool URLs
Published Apr 20, 2026 · Updated Apr 20, 2026
SSRF in AgentScope 1.0.18 and earlier allows remote attackers to make blind HTTP requests through multimodal tool calls. The _parse_url, prepare_image, and openai_audio_to_text paths pass LLM-generated image_url or audio_file_url values directly to requests.get without destination validation. A deployment is exposed when an attacker can influence conversations handled by an agent that registers the affected OpenAI tools, enabling internal-service probing and GET side effects without returning response bodies.
Summary
What happened
SSRF in AgentScope 1.0.18 and earlier allows remote attackers to make blind HTTP requests through multimodal tool calls. The _parse_url, prepare_image, and openai_audio_to_text paths pass LLM-generated image_url or audio_file_url values directly to requests.get without destination validation. A deployment is exposed when an attacker can influence conversations handled by an agent that registers the affected OpenAI tools, enabling internal-service probing and GET side effects without returning response bodies.
The record
- CVE
- CVE-2026-6604
- Published
- Apr 20, 2026
- Updated
- Apr 20, 2026
- Vendor
- ModelScope
- Product
- AgentScope
- Classifications
- CWE-918, T1046
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 20, 2026CVE publishedPublication date reported by the CVE source.
- Apr 20, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.0.0
- Affected versionversion=1.0.1
- Affected versionversion=1.0.10
- Affected versionversion=1.0.11
- Affected versionversion=1.0.12
- Affected versionversion=1.0.13
- Affected versionversion=1.0.14
- Affected versionversion=1.0.15
- Affected versionversion=1.0.16
- Affected versionversion=1.0.17
- Affected versionversion=1.0.18
- Affected versionversion=1.0.2
- Affected versionversion=1.0.3
- Affected versionversion=1.0.4
- Affected versionversion=1.0.5
- Affected versionversion=1.0.6
- Affected versionversion=1.0.7
- Affected versionversion=1.0.8
- Affected versionversion=1.0.9
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- SSRF via Tool Functions Exploitable Through Prompt Injection in AgentScopeproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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