# AsyncHttpClient: Cookie Domain attribute is not checked against the public suffix list, so a cookie can be set for co.uk

Advisory record · `GHSA-f9m8-cv68-674w`

- **Identifiers:** `GHSA-f9m8-cv68-674w` · `CVE-2026-107280`
- **State:** Confirmed
- **Severity:** CVSS 6.9 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-1275](https://cwe.mitre.org/data/definitions/1275.html)
- **Tags:** [CWE-1275](https://agentprime.io/advisories/tag/cwe-1275.md)
- **Published:** 8 Oct 2026
- **Updated:** 8 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 8 Oct 2026, 16:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `org.asynchttpclient:async-http-client` (Maven): affected `>=3.0.0, <3.0.13 || >=2.0.0, <2.16.1`; fixed in `3.0.13`, `2.16.1`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 6.9 Medium, CVSS 4.0: `CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0026, the 17th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:16 UTC: First seen by agentprime
- 31 Oct 2026, 14:16 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-f9m8-cv68-674w)

## Sources

- [GitHub Advisory Database: GHSA-f9m8-cv68-674w](https://github.com/advisories/GHSA-f9m8-cv68-674w)
- [OSV: GHSA-f9m8-cv68-674w](https://osv.dev/vulnerability/GHSA-f9m8-cv68-674w)
- <https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-f9m8-cv68-674w>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-107280>
- <https://github.com/AsyncHttpClient/async-http-client/commit/330267895fe0bdb41bbd027ea6b151d38ee7c23d>
- <https://github.com/AsyncHttpClient/async-http-client/commit/d1f0ccec417092098d40242fee7dfac84bb3c21f>
- <https://github.com/AsyncHttpClient/async-http-client>
- <https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1>
- <https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.13>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-f9m8-cv68-674w>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-f9m8-cv68-674w/>. Everything for agents: <https://agentprime.io/llms.txt>.