---
title: "CVE-2026-107281: AsyncHttpClient - Broken Access Control"
description: "AsyncHttpClient < 3.0.13 and < 2.16.1 contains a broken access control caused by HTTP/1.1 connection-pool key excluding authenticated principal for NTLM and Negotiate authentication, letting attackers reuse authenticated sockets as another identity, exploit requires use of connection-oriented NTLM or Negotiate authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-107281/
---

# CVE-2026-107281 AsyncHttpClient - Broken Access Control

AsyncHttpClient < 3.0.13 and < 2.16.1 contains a broken access control caused by HTTP/1.1 connection-pool key excluding authenticated principal for NTLM and Negotiate authentication, letting attackers reuse authenticated sockets as another identity, exploit requires use of connection-oriented NTLM or Negotiate authentication.

CVSS base score 7.6 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-107281)

## Details

Type

Broken Access Control

Impact

Broken Access Control, Privilege Escalation

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

7 October 2026

Updated

15 October 2026

Weakness

[CWE-346](https://cwe.mitre.org/data/definitions/346.html)

## Vendor fix

Update to versions 3.0.13 or 2.16.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-107281](https://nvd.nist.gov/vuln/detail/CVE-2026-107281)
- [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-2.16.1)
- [https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.13](https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.13)
- [https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-vvp4-63h8-v5pm](https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-vvp4-63h8-v5pm)
- [https://github.com/AsyncHttpClient/async-http-client/commit/73813babf51231ee79f7da4f07b777f19f48d34d](https://github.com/AsyncHttpClient/async-http-client/commit/73813babf51231ee79f7da4f07b777f19f48d34d)
- [https://github.com/AsyncHttpClient/async-http-client/commit/83e552e64cabab2119addb6b47f7c6482997c94e](https://github.com/AsyncHttpClient/async-http-client/commit/83e552e64cabab2119addb6b47f7c6482997c94e)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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