GHSA-m452-q8c9-rg2f

Source

https://github.com/advisories/GHSA-m452-q8c9-rg2f

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-m452-q8c9-rg2f/GHSA-m452-q8c9-rg2f.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-m452-q8c9-rg2f

Aliases

CVE-2026-55688

Downstream

CGA (21)

MINI (1)

MINI-4w5m-f4hh-f9qh

Published

2026-08-26T14:35:52Z

Modified

2026-09-10T03:51:14Z

Severity

4.0 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N CVSS Calculator

Summary

AsyncHttpClient stores cookie for an unrelated domain (cookie tossing) via ThreadSafeCookieStore

Details

Impact

A cookie tossing / cookie injection issue (CWE-1275). ThreadSafeCookieStore stored a cookie under the value of its Domain attribute without verifying that the responding host is allowed to set a cookie for that domain (RFC 6265 §5.3 step 6). A host the client connects to can therefore plant a cookie scoped to an unrelated domain, and the client will then send that cookie on later requests to that domain.

Who is Impacted

Applications that use a single AsyncHttpClient instance - and thus the default, shared CookieStore - to reach both an attacker-influenced host and a trusted host. Typical exposure: crawlers, link-preview / webhook fetchers, SSRF-style "fetch this URL" features, multi-backend aggregators, or following redirects to an attacker-controlled host. The attacker can write a cookie the client presents to the victim host (session fixation, overwriting a session id / CSRF-token cookie); they cannot read the victim host's cookies. Applications that talk only to a fixed trusted backend, or that disable/scope the cookie store, are not exposed.

Patches

Fixed in 3.0.11 and 2.16.0

Workarounds

Disable the cookie store (setCookieStore(null)) when cookies are not needed; or
Use a separate AsyncHttpClient (separate cookie store) per trust domain so an attacker-influenced host and a trusted host never share a jar
Supply a custom CookieStore whose add(Uri, Cookie) rejects cookies whose Domain is not domain-matched by the request host.

Database specific

{
    "cwe_ids":  [
        "CWE-1275"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-08-26T14:35:52Z",
    "nvd_published_at":  "2026-07-01T20:17:11Z",
    "severity":  "MODERATE"
}

References

Affected packages

Maven / org.asynchttpclient:async-http-client

Package

Name: org.asynchttpclient:async-http-client; View open source insights on deps.dev
Purl: pkg:maven/org.asynchttpclient/async-http-client

Affected ranges

Type: ECOSYSTEM
Events: Introduced

3.0.0.Beta1

Fixed

3.0.11

Affected versions

3.*

3.0.0.Beta1

3.0.0.Beta2

3.0.0.Beta3

3.0.0

3.0.1

3.0.2

3.0.3

3.0.4

3.0.5

3.0.6

3.0.7

3.0.8

3.0.9

3.0.10

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-m452-q8c9-rg2f/GHSA-m452-q8c9-rg2f.json"

Maven / org.asynchttpclient:async-http-client

Package

Name: org.asynchttpclient:async-http-client; View open source insights on deps.dev
Purl: pkg:maven/org.asynchttpclient/async-http-client

Affected ranges

Type: ECOSYSTEM
Events: Introduced

2.0.0

Fixed

2.16.0

Affected versions

2.*

2.0.0

2.0.1

2.0.2

2.0.3

2.0.4

2.0.5

2.0.6

2.0.7

2.0.8

2.0.9

2.0.10

2.0.11

2.0.12

2.0.13

2.0.14

2.0.15

2.0.16

2.0.17

2.0.18

2.0.19

2.0.20

2.0.21

2.0.22

2.0.23

2.0.24

2.0.25

2.0.26

2.0.27

2.0.28

2.0.29

2.0.30

2.0.31

2.0.32

2.0.33

2.0.34

2.0.35

2.0.36

2.0.37

2.0.38

2.0.39

2.0.40

2.1.0-alpha1

2.1.0-alpha2

2.1.0-alpha3

2.1.0-alpha4

2.1.0-alpha5

2.1.0-alpha6

2.1.0-alpha7

2.1.0-alpha8

2.1.0-alpha9

2.1.0-alpha10

2.1.0-alpha11

2.1.0-alpha12

2.1.0-alpha13

2.1.0-alpha14

2.1.0-alpha15

2.1.0-alpha16

2.1.0-alpha17

2.1.0-alpha18

2.1.0-alpha19

2.1.0-alpha20

2.1.0-alpha21

2.1.0-alpha22

2.1.0-alpha23

2.1.0-alpha24

2.1.0-alpha25

2.1.0-alpha26

2.1.0-RC1

2.1.0-RC2

2.1.0-RC3

2.1.0-RC4

2.1.0

2.1.1

2.1.2

2.2.0

2.2.1

2.3.0

2.4.0

2.4.1

2.4.2

2.4.3

2.4.4

2.4.5

2.4.6

2.4.7

2.4.8

2.4.9

2.5.0

2.5.1

2.5.2

2.5.3

2.5.4

2.6.0

2.7.0

2.8.0

2.8.1

2.9.0

2.10.0

2.10.1

2.10.2

2.10.3

2.10.4

2.10.5

2.11.0

2.12.0

2.12.1

2.12.2

2.12.3

2.12.4

2.14.5

2.15.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-m452-q8c9-rg2f/GHSA-m452-q8c9-rg2f.json"