---
id: CVE-2026-69215
title: Http4s is a Scala interface for HTTP services
summary: >-
  Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47,
  The CookieJar client middleware uses unanchored substring checks instead of
  RFC 6265 domain and path matching when deciding whether to attach a stored
  cookie.…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-565
  - CWE-1275
vendor: http4s
product: 'org.http4s:http4s-client_2.12'
affected:
  - 'org.http4s:http4s-client_2.12 <= 0.23.34'
  - 'org.http4s:http4s-client_2.13 <= 0.23.34'
  - 'org.http4s:http4s-client_3 <= 0.23.34'
  - 'org.http4s:http4s-client_2.13 >= 1.0.0-M1, <= 1.0.0-M46'
  - 'org.http4s:http4s-client_3 >= 1.0.0-M1, <= 1.0.0-M46'
patched:
  - 'org.http4s:http4s-client_2.12 0.23.35'
  - 'org.http4s:http4s-client_2.13 0.23.35'
  - 'org.http4s:http4s-client_3 0.23.35'
  - 'org.http4s:http4s-client_2.13 1.0.0-M47'
  - 'org.http4s:http4s-client_3 1.0.0-M47'
published: '2026-09-15'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T20:39:16.610'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-69215'
references:
  - url: >-
      https://github.com/http4s/http4s/commit/c0a37f38d5ee2a568ba57bd9da62f8d79b8b1fcc
    label: security-advisories@github.com
  - url: 'https://github.com/http4s/http4s/releases/tag/v0.23.35'
    label: security-advisories@github.com
  - url: 'https://github.com/http4s/http4s/releases/tag/v1.0.0-M47'
    label: security-advisories@github.com
  - url: 'https://github.com/http4s/http4s/security/advisories/GHSA-grh8-3p95-f9rr'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-grh8-3p95-f9rr'
tags:
  - nvd
  - ghsa
  - maven
  - cve.org
aliases:
  - GHSA-grh8-3p95-f9rr
ecosystem: maven
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-16T18:18:31.142649Z'
ingestedAt: '2026-09-15T19:42:58.833Z'
epss: 0.00505
epssPercentile: 0.40575
---

## Overview

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The CookieJar client middleware uses unanchored substring checks instead of RFC 6265 domain and path matching when deciding whether to attach a stored cookie. A cookie for example.com can consequently be sent to an attacker-controlled hostname such as evilexample.com when an application using the same jar makes an attacker-influenced outbound request. This exposes session or authentication cookies and can enable hijacking of the application’s outbound sessions. This issue is fixed in versions 0.23.35 and 1.0.0-M47.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-69215)

Affected packages:

- `org.http4s:http4s-client_2.12 <= 0.23.34`
- `org.http4s:http4s-client_2.13 <= 0.23.34`
- `org.http4s:http4s-client_3 <= 0.23.34`
- `org.http4s:http4s-client_2.13 >= 1.0.0-M1, <= 1.0.0-M46`
- `org.http4s:http4s-client_3 >= 1.0.0-M1, <= 1.0.0-M46`

Patched in:

- `org.http4s:http4s-client_2.12 0.23.35`
- `org.http4s:http4s-client_2.13 0.23.35`
- `org.http4s:http4s-client_3 0.23.35`
- `org.http4s:http4s-client_2.13 1.0.0-M47`
- `org.http4s:http4s-client_3 1.0.0-M47`

Source: https://github.com/advisories/GHSA-grh8-3p95-f9rr