CVE-2026-67427 json
Flyto2 Core: ${env.VAR} interpolation reads any env secret despite env.get being denylisted
published 2026-07-29 3 mo ago modified 2026-10-24 16 d ago also GHSA-hr7p-wg7r-hg9m , PYSEC-2026-3570 , EUVD-2026-50471
- cvss
- 8.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 39%
- public exploits
- 0
- none known
Summary
Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.6, the workflow engine variable resolver expands ${env.VAR} for any host environment variable without an allowlist or capability policy check, allowing a workflow parameter to bypass the default capability policy denylist for env.get and env.load_dotenv and exfiltrate secrets through allowed modules. This issue is fixed in version 2.26.6.
Patch / fix
- pypi flyto-core 2.26.7
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/flytohub/flyto-core/security/advisories/GHSA-hr7p-wg7r-hg9m referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N |
| GitHub | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N |
| OSV | 3.1 | 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | flyto-core | <2.26.7 |
2.26.7 |
Affected products
- flytohub flyto-core
Classification
References
-
github.com
/flytohub/flyto-core/commit/d5f89d71303e3c1e6418d347c5c55fcd173cc8cc
web
-
github.com
/flytohub/flyto-core/security/advisories/GHSA-hr7p-wg7r-hg9m
exploit, web
-
github.com
/flytohub/flyto-core/releases/tag/v2.26.6
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-67427
advisory
-
github.com
/flytohub/flyto-core
package
-
pypi.org
/project/flyto-core
package
-
github.com
/advisories/GHSA-hr7p-wg7r-hg9m
advisory
Sources
- CVE List CVE-2026-67427
- GitHub Advisory GHSA-hr7p-wg7r-hg9m
- NVD CVE-2026-67427
- OSV PYSEC-2026-3570
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