GHSA-grh8-3p95-f9rr

Suggest an improvement
Source
https://github.com/advisories/GHSA-grh8-3p95-f9rr
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-grh8-3p95-f9rr/GHSA-grh8-3p95-f9rr.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-grh8-3p95-f9rr
Aliases
Published
2026-09-15T20:00:54Z
Modified
2026-09-15T20:15:05Z
Severity
  • 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N CVSS Calculator
Summary
Http4s: CookieJar middleware matches by substring, leaking cookies cross-origin
Details

The CookieJar client middleware decides whether to attach a cookie to an outgoing request using an unanchored substring test on the host and path, instead of the domain match specified by RFC6265 5.1.3. A cookie stored for example.com is therefore sent to any host whose name merely contains example.com (e.g. evilexample.com), leaking potentially sensitive cookies to an attacker-chosen host.

Impact

Disclosure of session and authentication cookies to an attacker-controlled host, enabling session hijack of the application's outbound calls.

Preconditions

  • Application uses the CookieJar client middleware.
  • Application can be induced to make an outbound request to a host controlled by the attacker, where the hostname contains the targeted domain as a substring.

Workarounds

  • Do not use the CookieJar with clients that fetch attacker-influenced URLs
  • Apply a separate CookieJar per trusted origin.
Database specific 
{
    "cwe_ids":  [
        "CWE-1275",
        "CWE-565"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-09-15T20:00:54Z",
    "nvd_published_at":  null,
    "severity":  "MODERATE"
}
References

Affected packages

Maven
org.http4s:http4s-client_2.12

Package

Name
org.http4s:http4s-client_2.12
View open source insights on deps.dev
Purl
pkg:maven/org.http4s/http4s-client_2.12

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.23.35

Affected versions

0.*
0.10.0-M10
0.15.0
0.15.0a
0.15.1
0.15.1a
0.15.2
0.15.2a
0.15.3
0.15.3a
0.15.4
0.15.4a
0.15.5
0.15.5a
0.15.6
0.15.6a
0.15.7
0.15.7a
0.15.8
0.15.8a
0.15.9
0.15.9a
0.15.10
0.15.10a
0.15.11
0.15.11a
0.15.12
0.15.12a
0.15.13
0.15.13a
0.15.14
0.15.14a
0.15.15
0.15.15a
0.15.16
0.15.16a
0.16.0-M1
0.16.0-M2
0.16.0-M3
0.16.0-RC1
0.16.0-RC2
0.16.0-RC3
0.16.0
0.16.0a-M1
0.16.0a-M2
0.16.0a-M3
0.16.0a-RC1
0.16.0a-RC2
0.16.0a-RC3
0.16.0a
0.16.1
0.16.1a
0.16.2
0.16.2a
0.16.3
0.16.3a
0.16.4
0.16.4a
0.16.5
0.16.5a
0.16.6
0.16.6a
0.17.0-M1
0.17.0-M2
0.17.0-M3
0.17.0-RC1
0.17.0-RC2
0.17.0-RC3
0.17.0
0.17.1
0.17.2
0.17.3
0.17.4
0.17.5
0.17.6
0.18.0-M1
0.18.0-M2
0.18.0-M3
0.18.0-M4
0.18.0-M5
0.18.0-M6
0.18.0-M7
0.18.0-M8
0.18.0-M9
0.18.0
0.18.1
0.18.2
0.18.3
0.18.4
0.18.5
0.18.6
0.18.7
0.18.8
0.18.9
0.18.10
0.18.11
0.18.12
0.18.13
0.18.14
0.18.15
0.18.16
0.18.17
0.18.18
0.18.19
0.18.20
0.18.21
0.18.22
0.18.23
0.18.24
0.18.25
0.18.26
0.19.0-M1
0.19.0-M2
0.19.0-M3
0.19.0-M4
0.19.0
0.20.0-M1
0.20.0-M2
0.20.0-M3
0.20.0-M4
0.20.0-M5
0.20.0-M6
0.20.0-M7
0.20.0-RC1
0.20.0
0.20.1
0.20.2
0.20.3
0.20.4
0.20.5
0.20.6
0.20.7
0.20.8
0.20.9
0.20.10
0.20.11
0.20.12
0.20.13
0.20.14
0.20.15
0.20.16
0.20.17
0.20.18
0.20.19
0.20.20
0.20.21
0.20.22
0.20.23
0.21.0-M1
0.21.0-M2
0.21.0-M3
0.21.0-M4
0.21.0-M5
0.21.0-M6
0.21.0-RC1
0.21.0-RC2
0.21.0-RC3
0.21.0-RC4
0.21.0-RC5
0.21.0
0.21.1
0.21.2
0.21.3
0.21.4
0.21.5
0.21.6
0.21.7
0.21.8
0.21.9
0.21.11
0.21.12
0.21.13
0.21.14
0.21.15
0.21.16
0.21.17
0.21.18
0.21.19
0.21.20
0.21.21
0.21.22
0.21.23
0.21.24
0.21.25
0.21.26
0.21.27
0.21.28
0.21.29
0.21.30
0.21.31
0.21.32
0.21.33
0.21.34
0.22.0-M1
0.22.0-M2
0.22.0-M3
0.22.0-M4
0.22.0-M5
0.22.0-M6
0.22.0-M7
0.22.0-M8
0.22.0-RC1
0.22.0
0.22-53-01128f5
0.22-96-55d3184
0.22-129-24d065b
0.22-143-49b5a8d
0.22.1
0.22.2
0.22.3
0.22.4
0.22.5
0.22.6
0.22.7
0.22.8
0.22.9
0.22.10
0.22.11
0.22.12
0.22.13
0.22.14
0.22.15
0.23.0-M1
0.23.0-RC1
0.23.0
0.23.1
0.23.2
0.23.3
0.23.4
0.23.5
0.23.6
0.23.7
0.23.8
0.23.9
0.23.10
0.23.11
0.23.12
0.23.13
0.23.14
0.23.15
0.23.16
0.23.17
0.23.18
0.23.19-RC1
0.23.19-RC2
0.23.19-RC3
0.23.19
0.23.20
0.23.21
0.23.22
0.23.23
0.23.24
0.23.25
0.23.26
0.23.27
0.23.28
0.23.29
0.23.30
0.23.31
0.23.32
0.23.33
0.23.34

Database specific

last_known_affected_version_range 
"<= 0.23.34"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-grh8-3p95-f9rr/GHSA-grh8-3p95-f9rr.json"
org.http4s:http4s-client_2.13

Package

Name
org.http4s:http4s-client_2.13
View open source insights on deps.dev
Purl
pkg:maven/org.http4s/http4s-client_2.13

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.23.35

Affected versions

0.*
0.10.0-M10
0.21.0-M1
0.21.0-M2
0.21.0-M3
0.21.0-M4
0.21.0-M5
0.21.0-M6
0.21.0-RC1
0.21.0-RC2
0.21.0-RC3
0.21.0-RC4
0.21.0-RC5
0.21.0
0.21.1
0.21.2
0.21.3
0.21.4
0.21.5
0.21.6
0.21.7
0.21.8
0.21.9
0.21.11
0.21.12
0.21.13
0.21.14
0.21.15
0.21.16
0.21.17
0.21.18
0.21.19
0.21.20
0.21.21
0.21.22
0.21.23
0.21.24
0.21.25
0.21.26
0.21.27
0.21.28
0.21.29
0.21.30
0.21.31
0.21.32
0.21.33
0.21.34
0.22.0-M1
0.22.0-M2
0.22.0-M3
0.22.0-M4
0.22.0-M5
0.22.0-M6
0.22.0-M7
0.22.0-M8
0.22.0-RC1
0.22.0
0.22-53-01128f5
0.22-96-55d3184
0.22-129-24d065b
0.22-143-49b5a8d
0.22.1
0.22.2
0.22.3
0.22.4
0.22.5
0.22.6
0.22.7
0.22.8
0.22.9
0.22.10
0.22.11
0.22.12
0.22.13
0.22.14
0.22.15
0.23.0-M1
0.23.0-RC1
0.23.0
0.23.1
0.23.2
0.23.3
0.23.4
0.23.5
0.23.6
0.23.7
0.23.8
0.23.9
0.23.10
0.23.11
0.23.12
0.23.13
0.23.14
0.23.15
0.23.16
0.23.17
0.23.18
0.23.19-RC1
0.23.19-RC2
0.23.19-RC3
0.23.19
0.23.20
0.23.21
0.23.22
0.23.23
0.23.24
0.23.25
0.23.26
0.23.27
0.23.28
0.23.29
0.23.30
0.23.31
0.23.32
0.23.33
0.23.34

Database specific

last_known_affected_version_range 
"<= 0.23.34"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-grh8-3p95-f9rr/GHSA-grh8-3p95-f9rr.json"
org.http4s:http4s-client_3

Package

Name
org.http4s:http4s-client_3
View open source insights on deps.dev
Purl
pkg:maven/org.http4s/http4s-client_3

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.23.35

Affected versions

0.*
0.22.0-M8
0.22.0-RC1
0.22.0
0.22.1
0.22.2
0.22.3
0.22.4
0.22.5
0.22.6
0.22.7
0.22.8
0.22.9
0.22.10
0.22.11
0.22.12
0.22.13
0.22.14
0.22.15
0.23.0-M1
0.23.0-RC1
0.23.0
0.23.1
0.23.2
0.23.3
0.23.4
0.23.5
0.23.6
0.23.7
0.23.8
0.23.9
0.23.10
0.23.11
0.23.12
0.23.13
0.23.14
0.23.15
0.23.16
0.23.17
0.23.18
0.23.19-RC1
0.23.19-RC2
0.23.19-RC3
0.23.19
0.23.20
0.23.21
0.23.22
0.23.23
0.23.24
0.23.25
0.23.26
0.23.27
0.23.28
0.23.29
0.23.30
0.23.31
0.23.32
0.23.33
0.23.34

Database specific

last_known_affected_version_range 
"<= 0.23.34"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-grh8-3p95-f9rr/GHSA-grh8-3p95-f9rr.json"
org.http4s:http4s-client_2.13

Package

Name
org.http4s:http4s-client_2.13
View open source insights on deps.dev
Purl
pkg:maven/org.http4s/http4s-client_2.13

Affected ranges

Type
ECOSYSTEM
Events
Introduced
1.0.0-M1
Fixed
1.0.0-M47

Affected versions

1.*
1.0.0-M2
1.0.0-M3
1.0.0-M4
1.0.0-M5
1.0.0-M6
1.0.0-M7
1.0.0-M8
1.0.0-M9
1.0.0-M10
1.0.0-M11
1.0.0-M13
1.0.0-M14
1.0.0-M15
1.0.0-M16
1.0.0-M17
1.0.0-M18
1.0.0-M19
1.0.0-M20
1.0.0-M21
1.0.0-M22
1.0.0-M23
1.0.0-M24
1.0.0-M25
1.0.0-M27
1.0.0-M28
1.0.0-M29
1.0.0-M30
1.0.0-M31
1.0.0-M32
1.0.0-M33
1.0.0-M34
1.0.0-M35
1.0.0-M36
1.0.0-M37
1.0.0-M38
1.0.0-M39
1.0.0-M40
1.0.0-M41
1.0.0-M42
1.0.0-M43
1.0.0-M44
1.0.0-M45
1.0.0-M46

Database specific

last_known_affected_version_range 
"<= 1.0.0-M46"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-grh8-3p95-f9rr/GHSA-grh8-3p95-f9rr.json"
org.http4s:http4s-client_3

Package

Name
org.http4s:http4s-client_3
View open source insights on deps.dev
Purl
pkg:maven/org.http4s/http4s-client_3

Affected ranges

Type
ECOSYSTEM
Events
Introduced
1.0.0-M1
Fixed
1.0.0-M47

Affected versions

1.*
1.0.0-M22
1.0.0-M23
1.0.0-M24
1.0.0-M25
1.0.0-M27
1.0.0-M28
1.0.0-M29
1.0.0-M30
1.0.0-M31
1.0.0-M32
1.0.0-M33
1.0.0-M34
1.0.0-M35
1.0.0-M36
1.0.0-M37
1.0.0-M38
1.0.0-M39
1.0.0-M40
1.0.0-M41
1.0.0-M42
1.0.0-M43
1.0.0-M44
1.0.0-M45
1.0.0-M46

Database specific

last_known_affected_version_range 
"<= 1.0.0-M46"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-grh8-3p95-f9rr/GHSA-grh8-3p95-f9rr.json"