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Medium4.8Fortinet

Medium [CVE-2026-70466] Content-Encoding WAF Evasion

This medium-severity Fortinet advisory covers CVE-2026-70466 affecting FortiWeb.

FG-IR-26-157 Published Aug 12, 2026Updated by vendor Aug 12, 2026
Affected products & platforms
FortinetFortiWeb
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Summary

CVSSv3 Score:

4.8

An incomplete list of disallowed inputs [CWE-184] in FortiWeb WAF may allow an unauthenticated attacker to bypass policies via specifically crafted requests.

Revised on 2026-08-12 00:00:00

Affected versions
  • FortiWeb 8.0: 8.0.0 through 8.0.2
  • FortiWeb 7.6: 7.6.0 through 7.6.5
  • FortiWeb 7.4: 7.4 all versions
  • FortiWeb 7.2: 7.2 all versions

Official advisory · high-confidence parse· fetched 1 hour ago·verify at source

Fixed versions
  • FortiWeb 8.0: 8.0.3
  • FortiWeb 7.6: 7.6.6
  • FortiWeb 7.4: migrate to a fixed release
  • FortiWeb 7.2: migrate to a fixed release

Official advisory · high-confidence parse· fetched 1 hour ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Upgrade per the Affected/Solution table: FortiWeb 8.0: 8.0.3; FortiWeb 7.6: 7.6.6; FortiWeb 7.4: migrate to a fixed release; FortiWeb 7.2: migrate to a fixed release.

Official advisory · high-confidence parse· fetched 1 hour ago·verify at source

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