CVE-2026-67425 Flyto2 Core: LLM/API keys leak to an attacker-controlled base_url
Attackers can steal API keys by manipulating the base_url parameter in Flyto2 Core, exposing sensitive credentials to external hosts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-67425?
CVE-2026-67425 is a high-severity vulnerability in flytohub flyto-core, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.6, llm.chat reads provider keys such as OPENAI_API_KEY and ANTHROPIC_API_KEY from the environment and sends them in the Authorization: Bearer header to caller-controlled base_url, allowing an attacker to receive the operator's key on a public host that passes the SSRF guard. This issue is fixed in version 2.26.6.
Which versions are affected by CVE-2026-67425?
3 open source packages ship an affected version, including flyto-core.
| Package | Affected | Fixed in |
|---|---|---|
flyto-core PyPI | All versions | 2.26.7 |
flyto-core PyPI | All versions | 2.26.7 |
flyto-core PyPI | All versions | 2.26.7 |
How do I fix CVE-2026-67425?
Upgrade flyto-core to 2.26.7 or later.
Is CVE-2026-67425 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67425 exists.
Sources
Also known as GHSA-qq9q-xgm3-xv9g, PYSEC-2026-3573.