Significant-Gravitas AutoGPT up to 0.6.51 email_block.py smtplib.SMTP server-side request forgery

Summaryinfo

A vulnerability was found in Significant-Gravitas AutoGPT up to 0.6.51 and classified as critical. This issue affects the function smtplib.SMTP of the file autogpt_platform/backend/backend/blocks/email_block.py. Executing a manipulation can lead to server-side request forgery. This vulnerability is tracked as CVE-2026-33234. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Significant-Gravitas AutoGPT up to 0.6.51 and classified as critical. This vulnerability affects the function smtplib.SMTP of the file autogpt_platform/backend/backend/blocks/email_block.py. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

AutoGPT is a workflow automation platform for creating, deploying, and managing continuous artificial intelligence agents. In versions 0.1.0 through 0.6.51, SendEmailBlock in autogpt_platform/backend/backend/blocks/email_block.py accepts a user-supplied smtp_server (string) and smtp_port (integer) as per-execution block inputs, then passes them directly to Python's smtplib.SMTP() to open a raw TCP connection with no IP address validation. This completely bypasses the platform's hardened SSRF protections in backend/util/request.py — the validate_url_host() function and BLOCKED_IP_NETWORKS blocklist that every other block uses to block connections to private, loopback, link-local, and cloud metadata addresses. An authenticated user on a shared AutoGPT deployment can use this to perform non-blind internal network port scanning and service fingerprinting: smtplib reads the target's TCP banner on connect and embeds it in the exception message, which is persisted as user-visible block output via the execution framework. This issue has been fixed in version 0.6.52.

The advisory is available at github.com. This vulnerability was named CVE-2026-33234 since 03/18/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit.

Upgrading to version 0.6.52 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-202605-4261). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• Significant-Gravitas

Name

• AutoGPT

Version

• 0.6.0
• 0.6.1
• 0.6.2
• 0.6.3
• 0.6.4
• 0.6.5
• 0.6.6
• 0.6.7
• 0.6.8
• 0.6.9
• 0.6.10
• 0.6.11
• 0.6.12
• 0.6.13
• 0.6.14
• 0.6.15
• 0.6.16
• 0.6.17
• 0.6.18
• 0.6.19
• 0.6.20
• 0.6.21
• 0.6.22
• 0.6.23
• 0.6.24
• 0.6.25
• 0.6.26
• 0.6.27
• 0.6.28
• 0.6.29
• 0.6.30
• 0.6.31
• 0.6.32
• 0.6.33
• 0.6.34
• 0.6.35
• 0.6.36
• 0.6.37
• 0.6.38
• 0.6.39
• 0.6.40
• 0.6.41
• 0.6.42
• 0.6.43
• 0.6.44
• 0.6.45
• 0.6.46
• 0.6.47
• 0.6.48
• 0.6.49
• 0.6.50
• 0.6.51

Website

• Product: https://github.com/Significant-Gravitas/AutoGPT/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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