Description
An issue was discovered in phpMyAdmin. It is possible to bypass AllowRoot restriction ($cfg['Servers'][$i]['AllowRoot']) and deny rules for username by using Null Byte in the username. All 4.6.x versions (prior to 4.6.5), 4.4.x versions (prior to 4.4.15.9), and 4.0.x versions (prior to 4.0.10.18) are affected.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | phpmyadmin | 4:4.6.5.1-1 | — |
| Debian 13 | phpmyadmin | 4:4.6.5.1-1 | — |
| Debian 12 | phpmyadmin | 4:4.6.5.1-1 | — |
| Debian 8 | phpmyadmin | 4:4.2.12-2+deb8u6 | DLA-1821-1 |
| Debian 7 | phpmyadmin | 4:3.4.11.1-2+deb7u7 | DLA-757-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | phpmyadmin | 4:4.9.5+dfsg1-2ubuntu0.1~esm1 | USN-4843-1 |
| Ubuntu Pro 18.04 LTS | phpmyadmin | 4:4.6.6-5ubuntu0.5+esm1 | USN-4843-1 |
| Ubuntu Pro 16.04 LTS | phpmyadmin | 4:4.5.4.1-2ubuntu2.1+esm5 | USN-4843-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | phpmyadmin | 4:4.0.10-1ubuntu0.1+esm3 | USN-4843-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | phpMyAdmin | 4.6.5.2-1.1 | openSUSE-SU-2024:10054-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.23 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.22 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.21 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.20 | phpmyadmin | 4.6.5.2-r0 | — |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.18 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.17 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.16 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.15 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.14 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.13 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.12 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.11 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.10 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.9 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.8 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.7 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.6 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.5 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.4 | phpmyadmin | 4.6.5.2-r0 | — |
| Alpine v3.2 | phpmyadmin | 4.4.15.9-r0 | — |
Advisories 4
- USN-4843-1 phpmyadmin vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- DLA-757-1 phpmyadmin - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1821-1 phpmyadmin - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10054-1 phpMyAdmin-4.6.5.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 94521 vdb-entry
- https://www.phpmyadmin.net/security/PMASA-2016-60
- GLSA-201701-32 vendor-advisory
- [debian-lts-announce] 20190617 [SECURITY] [DLA 1821-1] phpmyadmin security update mailing-list