CVE-2016-9863

An issue was discovered in phpMyAdmin. With a very large request to table partitioning function, it is possible to invoke a Denial of Service (DoS) attack. All 4.6.x versions (prior to 4.6.5) are affected.

Published: 2016-12-10 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-9863 is rated Moderate Risk (58.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.94%). EPSS rose +1.31% over the last day, indicating growing attacker interest. 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-2016-9863

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 2026-06-15 0.63% 1.94% +1.31%
2 2025-03-30 1.57% 0.63% -0.94%
3 2025-03-29 — 1.57% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-9863

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:N/A:H 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:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P 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:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2016-9863

GitHub Security Advisory for CVE-2016-9863

GHSA-qgrq-64g6-mmh6 · Severity: high · Ecosystem: composer — phpMyAdmin DoS Vulnerability

OS Trackers for CVE-2016-9863

vendor priority summary link
alpine — CVE-2016-9863: 1 source package rows (phpmyadmin); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2016-9863
debian unimportant CVE-2016-9863 unimportant priority: Debian including 1 source packages (phpmyadmin), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): resolved 4. https://security-tracker.debian.org/tracker/CVE-2016-9863
gentoo normal CVE-2016-9863: 1 GLSA(s) (201701-32), 1 atom(s) (dev-db/phpmyadmin); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-9863
ubuntu medium CVE-2016-9863 medium priority: Ubuntu including 1 source packages (phpmyadmin), 6 status rows across 6 suites (precise, trusty, upstream, xenial, yakkety, zesty): not-affected 4, ignored 1, released 1. https://ubuntu.com/security/CVE-2016-9863

Affected software / configurations for CVE-2016-9863

Vendor Product Version Raw CPE
phpmyadmin phpmyadmin 4.6.0 cpe:2.3:a:phpmyadmin:phpmyadmin:4.6.0:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.6.1 cpe:2.3:a:phpmyadmin:phpmyadmin:4.6.1:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.6.2 cpe:2.3:a:phpmyadmin:phpmyadmin:4.6.2:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.6.3 cpe:2.3:a:phpmyadmin:phpmyadmin:4.6.3:*:*:*:*:*:*:*
phpmyadmin phpmyadmin 4.6.4 cpe:2.3:a:phpmyadmin:phpmyadmin:4.6.4:*:*:*:*:*:*:*

References for CVE-2016-9863

cvelogic Threat Intelligence