CVE-2017-14063

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.

Published: 2017-08-31 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]

Conclusion & alert: CVE-2017-14063 is rated Moderate Risk (61.2/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.83%). Core evidence: EPSS rose +1.20% over the last day, indicating growing attacker interest. Mandatory action: Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2017-14063

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-18 1.62% 2.83% +1.20%
2 2025-10-29 1.15% 1.62% +0.47%
3 2025-05-11 1.15%

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-14063

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
10.0 2.9 [email protected]

Weakness enumeration for CVE-2017-14063

GitHub Security Advisory for CVE-2017-14063

GHSA-93jq-624g-4p9p · Severity: high · Ecosystem: maven — Improper Input Validation in async-http-client

OS Trackers for CVE-2017-14063

vendor priority summary link
debian unimportant CVE-2017-14063 unimportant priority: Debian including 1 source packages (async-http-client), 3 status rows across 3 suites (bookworm, bullseye, sid): resolved 3. https://security-tracker.debian.org/tracker/CVE-2017-14063
redhat medium https://access.redhat.com/security/cve/CVE-2017-14063
suse medium https://www.suse.com/security/cve/CVE-2017-14063/
ubuntu medium CVE-2017-14063 medium priority: Ubuntu including 1 source packages (async-http-client), 8 status rows across 8 suites (artful, bionic, cosmic, disco, trusty, upstream, xenial, zesty): not-affected 5, ignored 2, released 1. https://ubuntu.com/security/CVE-2017-14063

Affected software / configurations for CVE-2017-14063

Vendor Product Version Raw CPE
asynchttpclient_project async-http-client < 2.0.35 cpe:2.3:a:asynchttpclient_project:async-http-client:*:*:*:*:*:*:*:*

References for CVE-2017-14063

URL Tags
http://openwall.com/lists/oss-security/2017/08/31/4 Mailing List Patch Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2669 Third Party Advisory
https://github.com/AsyncHttpClient/async-http-client/issues/1455 Issue Tracking Patch Third Party Advisory
https://lists.apache.org/thread.html/r04b15fd898a6b1612153543375daaa8145a0fd1804ec9fa2e0d95c97%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/r0a6b6429a7558051dbb70bd06584b4b1c334a80ec9203d3d39b7045a%40%3Ccommits.tez.apache.org%3E
https://lists.apache.org/thread.html/r14a74d204f285dd3a4fa203de6dbb4e741ddb7fdfff7915590e5b3db%40%3Cdev.tez.apache.org%3E
https://lists.apache.org/thread.html/r3df4b7ccc363b4850a24842138117aa4451b875bc4773a845b828fc6%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/r41a0e2c36f7d1854a4d56cb1e4aa720ef501782d887ece1c9b1e2d60%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/r4ebb9596d890f3528630492bd78237b3eef06f093bac238a0da9b630%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/r5b8666c4414500ff6e993bfa69cb6afa19b1b67c4585a045c0c21662%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/r5f07c30721503d4c02d5451f77a611a1a0bb2a94ddcdf071c9485ea3%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/r5f794dc07913c5f2ec08f540813b40e61b562d36f8b1f916e8705c56%40%3Cissues.tez.apache.org%3E
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https://lists.apache.org/thread.html/r7046a51116207588e36ca8c2e291327e391dae40712d267117475a98%40%3Cdev.tez.apache.org%3E
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https://lists.apache.org/thread.html/r79d9bab405414af45568c4683386f5e9fd02c10ca87ffa2ee33512dc%40%3Ccommits.pulsar.apache.org%3E
https://lists.apache.org/thread.html/r868875e67494a18d31e88cba2672f45c3fc6708ffdde445723004da4%40%3Cissues.tez.apache.org%3E
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https://lists.apache.org/thread.html/rbbad61e1ba5b21e234a6664963618acfee237af754eb20300d938e1e%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/rbc4fbb06ccb10e26e6064f57f6bd4935eabe2d18a0cb9a7183699396%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/rc550b8955b37b40fee18db99f167337c41c930d8c3763b9631e01dda%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/rcb46acc25917e01ebecca132e870da9ab935d5796686ed8a2785b026%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26%40%3Ccommits.pulsar.apache.org%3E
https://lists.apache.org/thread.html/re2510852c4a1f635b14b35e5dfd7597076928e723ab08559ede575e0%40%3Ccommits.pulsar.apache.org%3E
https://lists.apache.org/thread.html/re7367895ccbf64523efcd39a9181baf2eaa30b069d8d6496852fba56%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/rfaa4d578587f52a9c4d176af516a681a712c664e3be440a4163691d5%40%3Ccommits.pulsar.apache.org%3E
https://lists.apache.org/thread.html/rfd823a733b02cffbef5a69953fdcbed2d1d0afad5e1ea4e96ff6bf0a%40%3Cissues.tez.apache.org%3E
https://lists.apache.org/thread.html/rfe55d83e4070bcc9285bbbf6bc39635dbcbba6d14d89aab0f339c83a%40%3Ccommits.tez.apache.org%3E
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