---
title: "CVE-2026-107282: AsyncHttpClient: Replay to a different host sends the original host request and credentials to the new host"
url: https://erroneo.us/security/cve/CVE-2026-107282/
description: "CVE-2026-107282 (org.asynchttpclient:async-http-client (Maven)): The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-10-07
date_modified: 2026-10-10
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-107282"
kev: false
cvss: 9.4
epss: 0.00189
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-107282: AsyncHttpClient: Replay to a different host sends the original host request and credentials to the new host

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.2% , percentile 8: FIRST’s model estimates a 0.2% chance of exploitation activity in the next 30 days, higher than 8% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes org.asynchttpclient:async-http-client (Maven) >= 3.0.0, <= 3.0.12, fixed in 3.0.13 ; org.asynchttpclient:async-http-client (Maven) >= 2.0.0, <= 2.16.0, fixed in 2.16.1 . Check your lockfile, including transitive dependencies.

## What it is

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.13 and 2.16.1, cross-host request replay updates the current request but leaves the target request and related proxy context pointing at the original origin. Connection-pool selection, CONNECT handling, realm selection, and TLS setup can consequently send the original host's path, Host header, Authorization credentials, or plaintext request to the replay destination. Documented ResponseFilter failover and retry paths can trigger the replay. This issue is fixed in versions 3.0.13 and 2.16.1.

## Affected packages

- Maven `org.asynchttpclient:async-http-client` >= 3.0.0, <= 3.0.12 → fixed: 3.0.13
- Maven `org.asynchttpclient:async-http-client` >= 2.0.0, <= 2.16.0 → fixed: 2.16.1

## Affected products (CVE record)

- AsyncHttpClient async-http-client: >= 3.0.0, < 3.0.13, >= 2.0.0, < 2.16.1

## Severity

- GitHub_M CVSS 4.0: 9.4 `CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N`
- GitHub CVSS 4.0: 9.4 `CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.19% probability of exploitation activity in the next 30 days; percentile 8.

## Sources

- [GitHub Advisory GHSA-jmqq-x5g9-9p2w](https://github.com/advisories/GHSA-jmqq-x5g9-9p2w)
- [CVE.org record CVE-2026-107282](https://www.cve.org/CVERecord?id=CVE-2026-107282)
- [NVD entry CVE-2026-107282](https://nvd.nist.gov/vuln/detail/CVE-2026-107282)
- [github.com](https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-jmqq-x5g9-9p2w)
- [github.com](https://github.com/AsyncHttpClient/async-http-client/commit/15b254514a411623e5f1d8c99ea79c0f82f8a466)
- [github.com](https://github.com/AsyncHttpClient/async-http-client/commit/bbc31aed3b044f9f7a126cf689a8c8d7ad2ae1cb)
- [github.com](https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1)
- [github.com](https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.13)

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Source page: https://erroneo.us/security/cve/CVE-2026-107282/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt