CVE-2026-33234 AutoGPT: SendEmailBlock's IP blocklist bypass allows SSRF via user-controlled SMTP server
Authenticated users can bypass SSRF protections in AutoGPT's SendEmailBlock to scan internal networks and read service banners via user-controlled SMTP settings.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-33234?
CVE-2026-33234 is a medium-severity server-side request forgery vulnerability in Significant-Gravitas AutoGPT, published on 19 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-918
Which versions are affected by CVE-2026-33234?
How do I fix CVE-2026-33234?
No fix has been published for CVE-2026-33234 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-33234 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33234 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-4jwj-6mg5-wrwf.