CVE-2026-107282
Description
A flaw was found in AsyncHttpClient. When an application performs request retries or failovers to a different host, the client fails to properly reset the original host's security and proxy context. Consequently, an unintended destination host can receive sensitive information, including authorization credentials and request headers intended for the original server, resulting in information disclosure.
Statement
Why not Critical:
- Does NOT provide RCE (only credential theft)
- Attack complexity is HIGH (requires specific app configuration)
- Not wormable
- Requires failover/retry features to be enabled (not universal)
Mitigation
A workaround is available: do not use a ResponseFilter that replays a request to a different host, and disable request retries, whenever the client is configured with credentials or used through a proxy; replaying to the same host is not affected. Otherwise, upgrade to a fixed AsyncHttpClient version - 3.0.13 or later on the 3.x line, or 2.16.1 or later on the 2.x line - which move the target request and proxy context when a request is replayed.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.5 | N/A | N/A |
| Attack Vector | Network | N/A | N/A |
| Attack Complexity | High | N/A | N/A |
| Privileges Required | None | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | High | N/A | N/A |
| Integrity Impact | Low | N/A | N/A |
| Availability Impact | None | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Files or Directories; Read Memory; Read Application Data
Sensitive data may be exposed to attackers.
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