CVE-2026-13762 and CVE-2026-13763 - Issue with HTTP/2 multi-frame request body inspection in AWS WAF
Two vulnerabilities, CVE-2026-13762 and CVE-2026-13763, affect AWS WAF's inspection of HTTP/2 multi-frame request bodies. CVE-2026-13762 impacts AWS WAF when deployed with CloudFront and has been remediated server-side with no customer action required. CVE-2026-13763 affects AWS WAF with AWS Application Load Balancer (ALB), where under certain conditions only a partial HTTP/2 request body could be inspected. AWS released a configuration option on May 22, 2026, for ALB to address this issue, requiring customers to update their WAF HTTP/2 inspection settings to ensure full protection. No workarounds are available.
AI Analysis
Technical Summary
AWS WAF has two related vulnerabilities involving HTTP/2 multi-frame request body inspection. CVE-2026-13762 affects AWS WAF with CloudFront and was remediated server-side without requiring customer intervention. CVE-2026-13763 affects AWS WAF with ALB, where crafted multi-frame HTTP/2 requests could cause partial inspection of the request body. AWS addressed this by releasing a new ALB configuration option that accumulates HTTP/2 data frames before inspection. Customers must update their ALB WAF HTTP/2 inspection settings to enable this protection. No workarounds exist, and the fix involves configuration changes rather than software patches.
Potential Impact
If unmitigated, CVE-2026-13763 could allow crafted HTTP/2 multi-frame requests to evade full inspection by AWS WAF on ALB, potentially reducing the effectiveness of the web application firewall. CVE-2026-13762 has been fully remediated by AWS on the CloudFront deployment side with no customer action needed. There are no known exploits in the wild. The severity is assessed as low.
Mitigation Recommendations
For CVE-2026-13762, no customer action is required as AWS remediated the issue server-side for CloudFront deployments. For CVE-2026-13763, customers using AWS WAF with ALB should review and update the WAF HTTP/2 traffic inspection behavior by configuring the target group attributes for HTTP/2 endpoints as per the AWS developer guide. This configuration enables ALB to accumulate HTTP/2 data frames before AWS WAF inspection, ensuring full request body inspection. No workarounds are available.
CVE-2026-13762 and CVE-2026-13763 - Issue with HTTP/2 multi-frame request body inspection in AWS WAF
Description
Two vulnerabilities, CVE-2026-13762 and CVE-2026-13763, affect AWS WAF's inspection of HTTP/2 multi-frame request bodies. CVE-2026-13762 impacts AWS WAF when deployed with CloudFront and has been remediated server-side with no customer action required. CVE-2026-13763 affects AWS WAF with AWS Application Load Balancer (ALB), where under certain conditions only a partial HTTP/2 request body could be inspected. AWS released a configuration option on May 22, 2026, for ALB to address this issue, requiring customers to update their WAF HTTP/2 inspection settings to ensure full protection. No workarounds are available.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
AWS WAF has two related vulnerabilities involving HTTP/2 multi-frame request body inspection. CVE-2026-13762 affects AWS WAF with CloudFront and was remediated server-side without requiring customer intervention. CVE-2026-13763 affects AWS WAF with ALB, where crafted multi-frame HTTP/2 requests could cause partial inspection of the request body. AWS addressed this by releasing a new ALB configuration option that accumulates HTTP/2 data frames before inspection. Customers must update their ALB WAF HTTP/2 inspection settings to enable this protection. No workarounds exist, and the fix involves configuration changes rather than software patches.
Potential Impact
If unmitigated, CVE-2026-13763 could allow crafted HTTP/2 multi-frame requests to evade full inspection by AWS WAF on ALB, potentially reducing the effectiveness of the web application firewall. CVE-2026-13762 has been fully remediated by AWS on the CloudFront deployment side with no customer action needed. There are no known exploits in the wild. The severity is assessed as low.
Mitigation Recommendations
For CVE-2026-13762, no customer action is required as AWS remediated the issue server-side for CloudFront deployments. For CVE-2026-13763, customers using AWS WAF with ALB should review and update the WAF HTTP/2 traffic inspection behavior by configuring the target group attributes for HTTP/2 endpoints as per the AWS developer guide. This configuration enables ALB to accumulate HTTP/2 data frames before AWS WAF inspection, ensuring full request body inspection. No workarounds are available.
Technical Details
- Article Source
- {"url":"https://aws.amazon.com/security/security-bulletins/rss/2026-048-aws/","fetched":true,"fetchedAt":"2026-06-29T20:14:38.087Z","wordCount":219}
- Classification
- {"confidence":0.88,"severitySource":"default","classifier":"rss-v2"}
Threat ID: 6a42d22e27e9c79719700dbf
Added to database: 06/29/2026, 20:14:38 UTC
Last enriched: 07/06/2026, 21:11:01 UTC
Last updated: 08/13/2026, 18:08:34 UTC
Views: 361
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.