AsyncHttpClient cookie store lets one origin set cookies for another
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-384.
Summary
AsyncHttpClient async-http-client from 3.0.11 before 3.0.14 and from 2.16.0 through 2.16.1 incompletely validates cookie Domain attributes in ThreadSafeCookieStore. Missing public-suffix and IP-address checks let one origin store a cookie that is later sent to another origin, which is a session fixation risk (CWE-384). Applications that share one client across trust domains can receive attacker-injected cookies.
Written with Claude Haiku 5.5 from the sources below · 2026-11-04
Description from the CNA
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.16.0 until 3.0.14, ThreadSafeCookieStore incompletely validates cookie Domain attributes. Missing private-section and default public-suffix rules, absent A-label normalization, locale-sensitive lowercasing, public-suffix host-only handling, and numeric or IP host checks allow one origin to store a cookie later sent to another origin. Applications sharing one client across trust domains can therefore receive attacker-injected cookies and may be exposed to session fixation. This issue is fixed in version 3.0.14.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| AsyncHttpClient | async-http-client | 3.0.11 to before 3.0.14; 2.16.0 – 2.16.1 | 3.0.14 | Patch available | CNA |
- async-http-client VendorAsyncHttpClient Affected 3.0.11 to before 3.0.14; 2.16.0 – 2.16.1 Fixed in 3.0.14 Patch available CNA
Remediation
Upgrade async-http-client to version 3.0.14, which fixes this issue. Red Hat plans no fix for Red Hat Fuse 7.
Written with Claude Haiku 5.5 from the sources below · 2026-11-04
- Fix · CNA async-http-client (AsyncHttpClient) Fixed in 3.0.14
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Fuse 7 | Affected | No fix planned: Out of support scope |
Timeline
- 2026-10-07 Threatist record created from CVE-2026-107229
- 2026-10-08 CISA SSVC decision points changed
- 2026-11-04 Affected versions changed · Red Hat
- 2026-11-04 CVSS score added · Red Hat
References
More AsyncHttpClient vulnerabilities
- TI-2024-36149 AsyncHttpClient (AHC) library's `CookieStore` replaces explicitly defined `Cookie`s CVSS 4.0CRITICAL 9.2
- TI-2026-69321 Cross-host replay in AsyncHttpClient leaks credentials to new host CVSS 4.0CRITICAL 9.4
- TI-2026-69315 AsyncHttpClient sends passwords in cleartext after Digest downgrade CVSS 4.0HIGH 8.7
- TI-2026-58825 AsyncHttpClient: Unbounded HTTP/1.1 response decompression enables a decompression-bomb denial of service CVSS 3.1HIGH 7.5
- TI-2026-69311 Unbounded WebSocket decompression in AsyncHttpClient enables DoS CVSS 3.1HIGH 7.5
- TI-2026-58823 AsyncHttpClient: SOCKS proxy credentials sent to the origin server over plaintext HTTP CVSS 3.1HIGH 7.5
Sources
- CVE-2026-107229 · CVE Program
- CVE-2026-107229 · NVD
- FIRST EPSS
- CVE-2026-107229 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences