PatchTheCVECVE-2017-14063: Async Http Client (aka async-http-client) before 2.0.35 can be tricked into connecting to a host different fro
CVE-2017-14063 is a high-severity flaw (CVSS 7.5) affecting async-http-client. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Async Http Client (aka async-http-client) before 2.0.35 can be tricked into connecting to a host different from the one extracted by java.net.URI if a '?' character occurs in a fragment identifier. Similar bugs were previously identified in cURL (CVE-2016-8624) and Oracle Java 8 java.net.URL.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 3.0% (top 12%) |
| CISA exploited list | No |
| Weakness | CWE-20 |
| Published | 2017-08-31 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2017-14063?
async-http-client: upgrade to 2.0.35. Exact commands for each OS are on this page.
Is CVE-2017-14063 being exploited?
CVE-2017-14063 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2017-14063 affect?
CVE-2017-14063 affects async-http-client. Severity is high (CVSS 7.5). Async Http Client (aka async-http-client) before 2.0.35 can be tricked into connecting to a host different from the one extracted by java.net.URI if a '?' character occurs in a fragment identifier. Similar bugs were previously identified in
How urgent is CVE-2017-14063?
Priority 53/100. High severity; Remotely exploitable, no login, no user action
Software pages
Java vulnerabilities · curl vulnerabilities
Related CVEs
- CVE-2026-45300 HIGH 7.4 UPGRADE The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously
- CVE-2023-0040 HIGH 7.5 UPGRADE Versions of Async HTTP Client prior to 1.13.2 are vulnerable to a form of targeted request manipulation called
- CVE-2013-7398 MEDIUM 4.3 UPGRADE UPGRADE main/java/com/ning/http/client/AsyncHttpClientConfig.java in Async Http Client (aka AHC or async-http-client)
- CVE-2013-7397 MEDIUM 4.3 UPGRADE UPGRADE Async Http Client (aka AHC or async-http-client) before 1.9.0 skips X.509 certificate verification unless both