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CVE-2026-69203 Http4s Ember HTTP/2: does not enforce SETTINGS_MAX_CONCURRENT_STREAMS

🗓️ 15 Sep 2026 19:21:12Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 4 Views

Unbounded HTTP/2 streams in Http4s Ember before 0.23.35 cause heap exhaustion DoS.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-69203
15 Sep 202619:21
cve
euvd
EUVD
EUVD-2026-79194
15 Sep 202619:21
euvd
github
Github Security Blog
Http4s Ember HTTP/2 does not enforce SETTINGS_MAX_CONCURRENT_STREAMS
15 Sep 202619:53
github
nvd
NVD
CVE-2026-69203
15 Sep 202620:17
nvd
vulnrichment
Vulnrichment
CVE-2026-69203 Http4s Ember HTTP/2: does not enforce SETTINGS_MAX_CONCURRENT_STREAMS
15 Sep 202619:21
vulnrichment
[
  {
    "vendor": "http4s",
    "product": "http4s",
    "versions": [
      {
        "version": "< 0.23.35",
        "status": "affected"
      },
      {
        "version": ">= 1.0.0-M1, < 1.0.0-M47",
        "status": "affected"
      }
    ]
  }
]

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