CVE-2026-13763

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-29. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
9.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 9.8Exploit: None knownExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

Inconsistent interpretation of HTTP/2 requests in AWS Application Load Balancer with AWS WAF enabled might allow remote actors to bypass AWS WAF managed rule body inspection via crafted HTTP/2 requests that fragment the request body across frames so that only a partial body is inspected. This issue only impacts HTTP/2 ALB target groups.

To remediate this issue, customers should enable the "Inspect after sufficient data" target group configuration associated to an ALB load balancer. Refer to: ( https://docs.aws.amazon.com/elasticloadbalancing/latest/application/edit-target-group-attributes.html#waf-http2-inspection )

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
EPSS PROB
0.7%
EPSS %ILE
50th
KEV
Not listed

Published

June 29, 2026

Last Modified

July 1, 2026

Advisory Details (2)

Auto-updated Oct 4, 2026
No fix on record yet.
generic

Edit target group attributes for your Application Load Balancer - Elastic Load Balancing

https://docs.aws.amazon.com/elasticloadbalancing/latest/application/edit-target-group-attributes.html#waf-http2-inspection
generic

CVE-2026-13762 and CVE-2026-13763 - Issue with HTTP/2 multi-frame request body inspection in AWS WAF

https://aws.amazon.com/security/security-bulletins/2026-048-aws/

Vendor Advisories for CVE-2026-13763(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 35× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 430 total refreshes for this CVE.

  1. 2026-10-07 23:47 UTCEPSS rescore
  2. 2026-10-06 15:17 UTCEPSS rescore
  3. 2026-10-05 17:42 UTCEPSS rescore
  4. 2026-10-04 23:21 UTCEPSS rescore
  5. 2026-10-03 14:25 UTCEPSS rescore
  6. 2026-10-01 19:49 UTCEPSS rescore
  7. 2026-09-30 15:02 UTCEPSS rescore
  8. 2026-09-29 15:20 UTCEPSS rescore
  9. 2026-09-28 13:51 UTCEPSS rescore
  10. 2026-09-27 13:47 UTCEPSS rescore
  11. 2026-09-26 15:58 UTCEPSS rescore
  12. 2026-09-23 13:47 UTCEPSS rescore
  13. 2026-09-23 11:16 UTCGHSA enrichment
  14. 2026-09-23 07:26 UTCEG score recompute
  15. 2026-09-23 07:26 UTCGHSA enrichment
  16. 2026-09-20 20:15 UTCEPSS rescore
  17. 2026-09-18 19:27 UTCEPSS rescore
  18. 2026-09-18 11:09 UTCGHSA enrichment
  19. 2026-09-18 06:56 UTCEG score recompute
  20. 2026-09-18 06:56 UTCGHSA enrichment
  21. 2026-09-16 05:14 UTCEPSS rescore
  22. 2026-09-14 08:15 UTCGHSA enrichment
  23. 2026-09-14 04:30 UTCGHSA enrichment
  24. 2026-09-14 00:50 UTCEG score recompute
  25. 2026-09-14 00:50 UTCGHSA enrichment
Show 75 more
  1. 2026-09-13 16:46 UTCEPSS rescore
  2. 2026-09-13 13:07 UTCGHSA enrichment
  3. 2026-09-13 09:24 UTCGHSA enrichment
  4. 2026-09-12 15:13 UTCEG score recompute
  5. 2026-09-12 15:13 UTCGHSA enrichment
  6. 2026-09-12 15:00 UTCEPSS rescore
  7. 2026-09-11 14:52 UTCEPSS rescore
  8. 2026-09-11 09:36 UTCEPSS rescore
  9. 2026-09-10 09:34 UTCEPSS rescore
  10. 2026-09-08 22:00 UTCEPSS rescore
  11. 2026-09-07 16:01 UTCEPSS rescore
  12. 2026-09-06 14:40 UTCEG score recompute
  13. 2026-09-06 14:40 UTCGHSA enrichment
  14. 2026-09-06 13:47 UTCEPSS rescore
  15. 2026-09-04 05:06 UTCEPSS rescore
  16. 2026-09-02 14:11 UTCEPSS rescore
  17. 2026-09-01 13:53 UTCEPSS rescore
  18. 2026-09-01 04:39 UTCEPSS rescore
  19. 2026-08-31 02:07 UTCGHSA enrichment
  20. 2026-08-30 22:23 UTCEG score recompute
  21. 2026-08-30 22:23 UTCGHSA enrichment
  22. 2026-08-30 19:17 UTCEPSS rescore
  23. 2026-08-30 18:24 UTCEG score recompute
  24. 2026-08-30 18:24 UTCGHSA enrichment
  25. 2026-08-30 01:21 UTCEPSS rescore
  26. 2026-08-28 21:40 UTCEPSS rescore
  27. 2026-08-28 02:53 UTCGHSA enrichment
  28. 2026-08-27 22:45 UTCEG score recompute
  29. 2026-08-27 22:45 UTCGHSA enrichment
  30. 2026-08-27 14:24 UTCEPSS rescore
  31. 2026-08-25 13:48 UTCEPSS rescore
  32. 2026-08-25 05:07 UTCGHSA enrichment
  33. 2026-08-25 01:28 UTCGHSA enrichment
  34. 2026-08-24 21:45 UTCEG score recompute
  35. 2026-08-24 21:45 UTCGHSA enrichment
  36. 2026-08-24 12:39 UTCEG score recompute
  37. 2026-08-24 12:39 UTCGHSA enrichment
  38. 2026-08-24 04:28 UTCGHSA enrichment
  39. 2026-08-23 23:09 UTCGHSA enrichment
  40. 2026-08-23 19:29 UTCGHSA enrichment
  41. 2026-08-23 15:48 UTCGHSA enrichment
  42. 2026-08-23 12:09 UTCGHSA enrichment
  43. 2026-08-23 08:29 UTCGHSA enrichment
  44. 2026-08-23 04:30 UTCGHSA enrichment
  45. 2026-08-23 00:50 UTCEG score recompute
  46. 2026-08-23 00:50 UTCGHSA enrichment
  47. 2026-08-23 00:19 UTCEPSS rescore
  48. 2026-08-22 20:46 UTCGHSA enrichment
  49. 2026-08-22 12:43 UTCGHSA enrichment
  50. 2026-08-22 08:46 UTCEG score recompute
  51. 2026-08-22 08:46 UTCGHSA enrichment
  52. 2026-08-21 23:48 UTCEPSS rescore
  53. 2026-08-21 23:20 UTCGHSA enrichment
  54. 2026-08-21 19:32 UTCGHSA enrichment
  55. 2026-08-21 15:52 UTCGHSA enrichment
  56. 2026-08-21 12:12 UTCGHSA enrichment
  57. 2026-08-21 08:31 UTCGHSA enrichment
  58. 2026-08-21 04:51 UTCGHSA enrichment
  59. 2026-08-20 23:14 UTCEG score recompute
  60. 2026-08-20 23:14 UTCGHSA enrichment
  61. 2026-08-20 22:55 UTCEPSS rescore
  62. 2026-08-20 19:35 UTCGHSA enrichment
  63. 2026-08-20 15:56 UTCGHSA enrichment
  64. 2026-08-20 09:21 UTCGHSA enrichment
  65. 2026-08-20 05:41 UTCEG score recompute
  66. 2026-08-20 05:41 UTCGHSA enrichment
  67. 2026-08-19 17:03 UTCEPSS rescore
  68. 2026-08-19 16:30 UTCGHSA enrichment
  69. 2026-08-19 12:35 UTCGHSA enrichment
  70. 2026-08-19 07:41 UTCGHSA enrichment
  71. 2026-08-19 03:57 UTCGHSA enrichment
  72. 2026-08-18 23:09 UTCEG score recompute
  73. 2026-08-18 23:09 UTCGHSA enrichment
  74. 2026-08-18 13:48 UTCEPSS rescore
  75. 2026-08-18 06:30 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-13763?
CVE-2026-13763 is a critical vulnerability published on June 29, 2026. Inconsistent interpretation of HTTP/2 requests in AWS Application Load Balancer with AWS WAF enabled might allow remote actors to bypass AWS WAF managed rule body inspection via crafted HTTP/2 requests that fragment the request body across frames so that only a partial body is inspected. This issue…
When was CVE-2026-13763 disclosed?
CVE-2026-13763 was first published on June 29, 2026, with the most recent update on July 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13763 actively exploited?
CVE-2026-13763 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (50th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-13763?
CVE-2026-13763 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-13763?
No fix for CVE-2026-13763 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-13763 are linked in the Vendor Advisories panel on this page.

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