Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable workflow submission with no auth or interaction in default AutoGPT deployments yields AV:N/AC:L/PR:N/UI:N; impact is pure disk-exhaustion DoS, so C:N/I:N/A:H.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
2DescriptionCVE.org
AutoGPT is a workflow automation platform for creating, deploying, and managing continuous artificial intelligence agents. Prior to 0.6.63, StepThroughItemsBlock can iterate all the contents in a list and send them to FileStoreBlock for downloading one by one. Although FileStoreBlock has access time limits for downloading files, StepThroughItemsBlock can be used to slowly iterate and download relatively small files (e.g., 100M) multiple times. StepThroughItemsBlock does not limit the number of loops. In addition, FileStoreBlock does not limit the amount of disk space consumed in the current working directory. When a malicious user chooses to download too many videos, the disk space will eventually run out, causing a DoS. Version 0.6.63 patches the issue.
AnalysisAI
Denial of service in AutoGPT versions prior to 0.6.63 allows remote unauthenticated attackers to exhaust disk space on the host running the workflow automation platform by abusing the StepThroughItemsBlock to repeatedly drive FileStoreBlock downloads. The platform's StepThroughItemsBlock has no loop cap and FileStoreBlock enforces no working-directory disk quota, so an attacker can iteratively download moderately sized files (e.g., 100MB) until storage is exhausted. No public exploit identified at time of analysis, but the GitHub Security Advisory GHSA-9fr4-9jj9-mhh6 confirms the issue and the fix in 0.6.63.
Technical ContextAI
AutoGPT (cpe:2.3:a:significant-gravitas:autogpt) is a Python-based workflow automation platform that chains together composable 'blocks' to build autonomous AI agent pipelines. Two such blocks interact unsafely here: StepThroughItemsBlock iterates over an arbitrary input list and forwards each element to the next block, and FileStoreBlock retrieves a file from a URL into the current working directory. The root cause maps to CWE-400 (Uncontrolled Resource Consumption): neither block enforces an upper bound - StepThroughItemsBlock has no maximum iteration count, and FileStoreBlock enforces only a per-download time/access window rather than a cumulative disk-space quota. Chained together, they form an unbounded download loop that writes to local storage with no aggregate ceiling.
RemediationAI
Vendor-released patch: upgrade AutoGPT to version 0.6.63 or later, which addresses the issue per advisory GHSA-9fr4-9jj9-mhh6 (https://github.com/Significant-Gravitas/AutoGPT/security/advisories/GHSA-9fr4-9jj9-mhh6). Where immediate patching is not possible, compensating controls include restricting who can create or submit workflows so untrusted users cannot author graphs containing StepThroughItemsBlock+FileStoreBlock chains (trade-off: limits multi-tenant functionality), placing the AutoGPT working directory on a dedicated filesystem or volume with a hard quota so disk exhaustion cannot impact the rest of the host (trade-off: legitimate large workflows may fail), and adding monitoring/alerting on working-directory growth rate plus egress traffic from FileStore downloads to detect abuse early (trade-off: detective rather than preventive). Network-level egress filtering to constrain which URLs FileStoreBlock can reach further reduces the attack surface but may break legitimate agent workflows.
DOM-based cross-site scripting in AutoGPT versions prior to 0.6.62 allows remote attackers to execute arbitrary JavaScri
Denial of service in Significant-Gravitas AutoGPT prior to 0.6.63 allows remote attackers to exhaust host disk space by
Denial of service in AutoGPT prior to 0.6.63 allows remote unauthenticated users to exhaust host disk space by chaining
Resource exhaustion denial-of-service in Significant Gravitas AutoGPT versions prior to 0.6.63 allows remote unauthentic
Server-side request forgery in the AutoGPT Platform (versions prior to 0.6.52) lets an authenticated user abuse the Send
Unauthenticated denial-of-service in AutoGPT Platform versions 0.4.2 through 0.6.51 allows remote attackers to exhaust s
Authenticated session hijacking in Significant Gravitas AutoGPT versions 0.6.36 through 0.6.50 allows any logged-in user
Disk exhaustion denial-of-service in Significant Gravitas AutoGPT prior to version 0.6.63 allows authenticated platform
{webhook_id}/ping` endpoint performs no ownership check - only verifying that a caller is authenticated, not that the ta
Memory amplification denial-of-service in AutoGPT's ExtractTextInformationBlock enables authenticated users to exhaust s
Memory exhaustion in AutoGPT's AITextSummarizerBlock allows authenticated users to trigger extreme resource amplificatio
Same weakness CWE-400 – Uncontrolled Resource Consumption
View allSame technique Denial Of Service
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External POC / Exploit Code
Leaving vuln.today
EUVD-2025-210280