CVE-2026-67426: Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.7, the standalone flyto-verification service in src/core/verification_service.py exposes una

criticalCVSS 9.3CVE-2026-67426

Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.7, the standalone flyto-verification service in src/core/verification_service.py exposes unauthenticated POST /run on 0.0.0.0:8344 and uses client-supplied callback_url for an outbound POST with X-Internal-Key: $FLYTO_RUNNER_SECRET while bypassing target_allowed, allowing unauthenticated SSRF and runner secret exfiltration. This issue is fixed in version 2.26.7.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: critical — CVSS 9.3
Published: 2026-07-29
Last updated: 2026-07-30
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-67426

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-674260.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-67426	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

criticalGHSA-jx74-cqjv-2c67: Flyto2 Core: Unauthenticated flyto-verification /run: callback_url SSRF and internal runn…ghsa

Recent advisories for Flyto2 Core is

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highGHSA-c9hr-64h3-gxpc: Flyto2 Core: Guarded HTTP modules follow redirects into internal space without per-hop SS…ghsa · 2026-07-30
highGHSA-pgwh-4jj4-qm8v: Flyto2 Core: Multiple HTTP-family modules fetch client-controlled URLs without the SSRF g…ghsa · 2026-07-30
criticalGHSA-jx74-cqjv-2c67: Flyto2 Core: Unauthenticated flyto-verification /run: callback_url SSRF and internal runn…ghsa · 2026-07-30
highGHSA-qq9q-xgm3-xv9g: Flyto2 Core: LLM/API keys leak to an attacker-controlled base_urlghsa · 2026-07-30
highGHSA-hr7p-wg7r-hg9m: Flyto2 Core: ${env.VAR} interpolation reads any env secret despite env.get being denylist…ghsa · 2026-07-30
criticalGHSA-2956-977x-2w3r: Flyto2 Core: Arbitrary file write via image.download (and other file-writing modules)ghsa · 2026-07-30