AsyncHttpClient: Cookies received over plaintext HTTP can plant, overwrite or delete Secure cookies set over HTTPS

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

6.8 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N

EPSS

• CVE-2026-107226: 0.29% estimated exploitation activity in the next 30 days; percentile 22.07 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact The cookie store ignores the scheme a Set-Cookie arrived on. draft-ietf-httpbis-rfc6265bis-22 (approved to obsolete RFC 6265, in the RFC Editor queue) Section 5.7 requires a user agent to ignore a cookie with the Secure attribute unless it arrived over a secure connection (step 13), and to ignore a non-Secure cookie from an insecure connection when it would overlay a Secure cookie the store already holds (step 16). Neither rule is implemented. The only Secure handling is on retrieval, where a Secure cookie is not sent over plaintext. So anyone who can answer a plaintext request to a site can set, replace or delete the site's Secure cookies, and the next HTTPS request carries the attacker's value back inside TLS: This does not need an attacker on the network path. A plaintext host under the same site reaches the HTTPS one by setting a domain cookie: A plaintext Set-Cookie of the same name, domain and path overwrites a Secure cookie, and one with Max-Age=0 deletes it. Depending…

Published by the source

8 Oct 2026, 16:49 UTC

Last modified by the source

8 Oct 2026, 17:00 UTC

Source last checked

26 Oct 2026, 16:58 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-p2jm-6hj6-9rjg

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-p2jm-6hj6-9rjg

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# Patch Next advisory brief: CVE-2026-107226

Advisory: AsyncHttpClient: Cookies received over plaintext HTTP can plant, overwrite or delete Secure cookies set over HTTPS
IDs: CVE-2026-107226, GHSA-p2jm-6hj6-9rjg
Record: https://patchnext.com/advisories/cve-2026-107226 (revision 2, source checked 26 Oct 2026, 16:58 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Partial vendor fix; fixed versions by package: org.asynchttpclient:async-http-client 3.0.14. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.asynchttpclient:async-http-client: affected >= 3.0.0, <= 3.0.13; >= 2.1.0, <= 2.16.1; fixed in 3.0.14

## Suggested inspection (read-only)
- Maven org.asynchttpclient:async-http-client: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.asynchttpclient:async-http-client.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-p2jm-6hj6-9rjg (OSV record GHSA-p2jm-6hj6-9rjg lists affected ranges: Maven org.asynchttpclient:async-http-client >=3.0.0 =2.1.0 <=2.16.1)
- Verified: https://github.com/advisories/GHSA-p2jm-6hj6-9rjg (GitHub-reviewed advisory GHSA-p2jm-6hj6-9rjg lists affected ranges: Maven org.asynchttpclient:async-http-client >=3.0.0 =2.1.0 <=2.16.1)

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