McAfee Web Gateway denial of service attack due to Improper Input Validation
Priority LOW 37CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.0 · CNA. Fix status from CNA.
Summary
Improper input validation in the proxy component of McAfee Web Gateway 7.8.2.0 and later allows remote attackers to cause a denial of service via a crafted HTTP request parameter.
Why it matters now
EPSS 0.02268 83rd percentileScored 2026-11-07
Fix Fixed McAfee Web Gateway (McAfee): 7.8.2.5, 8.0.2
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| McAfee | McAfee Web Gateway | 7.8.2 and later; 7.8.2.5 to before 7.8.2.5; 8.0 and later; 8.0.2 to before 8.0.2 | 7.8.2.5, 8.0.2 | Patch available | CNA |
- McAfee Web Gateway VendorMcAfee Affected 7.8.2 and later; 7.8.2.5 to before 7.8.2.5; 8.0 and later; 8.0.2 to before 8.0.2 Fixed in 7.8.2.5, 8.0.2 Patch available CNA
Remediation
- Fix · CNA McAfee Web Gateway (McAfee) Fixed in 7.8.2.5, 8.0.2
Timeline
- 2026-10-02 Threatist record created from CVE-2019-3581
- 2026-10-03 Alias added: GHSA-f233-9p3q-5vq9
References
More Mcafee Web Gateway vulnerabilities
- TI-2018-04910 McAfee Web Gateway - Authentication Bypass vulnerability CVSS 3.0CRITICAL 10.0
- TI-2018-04917 McAfee Web Gateway (MWG) - Directory Traversal vulnerability CVSS 3.1CRITICAL 9.1
- TI-2018-04918 McAfee Web Gateway (MWG) - Configuration/Environment manipulation vulnerability CVSS 3.1CRITICAL 9.1
Sources
- CVE-2019-3581 · CVE Program
- CVE-2019-3581 · NVD
- FIRST EPSS
- GHSA-f233-9p3q-5vq9 · GitHub Advisory Database · CC BY 4.0
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