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SCA: security update for org.http4s:http4s-ember-core_2.12, org.http4s:http4s-ember-core_2.13, org.http4s:http4s-ember-core_3 (GHSA-8f3q-3jmv-7prw)

high Tenable Cloud Security Plugin ID 448007

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember HTTP/2 serializes
 outbound frames through one unbounded queue consumed by writeLoop. When the peer stops reading, an
 unauthenticated HTTP/2 client can continue sending PING, SETTINGS, or DATA frames that cause Ember to
 enqueue acknowledgments or WINDOW_UPDATE frames faster than the writer drains them, exhausting heap memory
 on a server built with withHttp2. The shared behavior also affects an ember-client connected to a hostile
 HTTP/2 server, and the patch replaces the unbounded path with bounded, backpressured outbound queues. This
 issue is fixed in versions 0.23.35 and 1.0.0-M47. (CVE-2026-69213)

Solution

Update the org.http4s:http4s-ember-core_2.12 library and its related packages to version 0.23.35 or later.

See Also

https://github.com/advisories/GHSA-8f3q-3jmv-7prw

Plugin Details

Severity: High

ID: 448007

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 9/16/2026

Updated: 9/16/2026

Risk Information

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-69213

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/15/2026

Vulnerability Publication Date: 9/15/2026

Reference Information

CVE: CVE-2026-69213