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CVE-2026-69209

CVE-2026-69209

waiting for further signalsZero needs more public information before it can validate it.

GHSA-jrxx-w2m8-5hf5 ↗EUVD-2026-79173 ↗

no check availablenot proven exploitable
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
maven:org.http4s:http4s-ember-core_2.12 <= 0.23.34; >= 1.0.0-M1, <= 1.0.0-M46
fixed in 0.23.35, 1.0.0-M47
CWE-400 Uncontrolled Resource Consumption
ETK-2026-773, permanent identifier
pkg:maven/org.http4s/http4s-ember-core_2.12
pkg:maven/org.http4s/http4s-ember-core_2.13
pkg:maven/org.http4s/http4s-ember-core_3
cvss7.5cna vendorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
14d 22h 28msince last run
10mAI analysisAnalysis: how long the AI spent reversing this signal.
timeline
0 = trigger signal
trigger signal (cve.org) +0hwaiting for further signals+499h16m
0
+2h
+4h
+6h
+8h
+10h

description

Affected http4s Ember Core versions can buffer excessively large or fragmented WebSocket messages without adequate bounds. A remote client that has completed a WebSocket handshake can consume server memory and disrupt service; a reachable WebSocket endpoint is required.

mitigation

Upgrade org.http4s:http4s-ember-core_2.12 to 0.23.35 or later, and upgrade the 2.13 or 3 variants to 0.23.35 or 1.0.0-M47 or later. For Ember Server deployments, configure an appropriate maximum WebSocket message size.

fixed in 0.23.35, 1.0.0-M47

check
no
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
contextual
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
0.63%49th percentile
agent run time
10m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-09-15 18:55Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
–
Δ to kevAttacks confirmed in the real world.
–

outcome

Contextual: an exploit technique exists, but no deterministic check could cover this one.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-09-15 18:55Z
  2. 2026-09-15 18:55Z

this entry in the feed

GET /api/v1/feed/CVE-2026-69209

{
  "etk_id": "ETK-2026-773",
  "cve_id": "CVE-2026-69209",
  "display_id": "CVE-2026-69209",
  "ghsa_id": "GHSA-jrxx-w2m8-5hf5",
  "euvd_id": "EUVD-2026-79173",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Unbounded WebSocket buffering in http4s ember core",
  "summary": "Affected http4s Ember Core versions can buffer excessively large or fragmented WebSocket messages without adequate bounds. A remote client that has completed a WebSocket handshake can consume server memory and disrupt service; a reachable WebSocket endpoint is required.",
  "mitigation": "Upgrade org.http4s:http4s-ember-core_2.12 to 0.23.35 or later, and upgrade the 2.13 or 3 variants to 0.23.35 or 1.0.0-M47 or later. For Ember Server deployments, configure an appropriate maximum WebSocket message size.",
  "vendor": "maven",
  "product": "maven:org.http4s:http4s-ember-core_2.12",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 0.23.34"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "0.23.35"
      ],
      "package_name": "org.http4s:http4s-ember-core_2.12",
      "purl": "pkg:maven/org.http4s/http4s-ember-core_2.12"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 0.23.34"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "0.23.35"
      ],
      "package_name": "org.http4s:http4s-ember-core_2.13",
      "purl": "pkg:maven/org.http4s/http4s-ember-core_2.13"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 0.23.34"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "0.23.35"
      ],
      "package_name": "org.http4s:http4s-ember-core_3",
      "purl": "pkg:maven/org.http4s/http4s-ember-core_3"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.0.0-M1, <= 1.0.0-M46"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "1.0.0-M47"
      ],
      "package_name": "org.http4s:http4s-ember-core_2.13",
      "purl": "pkg:maven/org.http4s/http4s-ember-core_2.13"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1.0.0-M1, <= 1.0.0-M46"
      ],
      "ecosystem": "maven",
      "fixed_versions": [
        "1.0.0-M47"
      ],
      "package_name": "org.http4s:http4s-ember-core_3",
      "purl": "pkg:maven/org.http4s/http4s-ember-core_3"
    }
  ],
  "cwes": [
    400
  ],
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": 0.0063,
  "epss_percentile": 0.4925,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 9.505432016666667,
  "t0_at": "2026-09-15T18:55:29.782000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-09-15T18:55:29.782000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-15T18:55:29.782000+00:00",
      "url": "https://github.com/http4s/http4s/security/advisories/GHSA-jrxx-w2m8-5hf5"
    }
  }
}

published 2026-10-06 14:02Z
last change 2026-10-21 12:26Z

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