Every CVE Search/ Get API key

CVE-2026-119561

phpMyAdmin through 5.2.3 WebAuthn Two-Factor Authentication Bypass via CustomServer

7.6 High

phpMyAdmin through 5.2.3 contains an authentication bypass vulnerability in CustomServer::parseAndValidateAssertionResponse() that never verifies WebAuthn assertion signatures against stored public keys. Attackers holding a victim's MySQL credentials can POST a crafted webauthn_request_response with matching challenge, origin, and rpIdHash to bypass the second factor and gain database privileges.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
None

Exploit likelihood

0.20%Unchanged since Oct 31, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.6

phpMyAdmin through 5.2.3 WebAuthn Two-Factor Authentication Bypass via CustomServer

phpMyAdmin through 5.2.3 contains an authentication bypass vulnerability in CustomServer::parseAndValidateAssertionResponse() that never verifies WebAuthn assertion signatures against stored public keys. Attackers holding a victim's MySQL credentials can POST a crafted webauthn_request_response with matching challenge, origin, and rpIdHash to bypass the second factor and gain database privileges.

Record
CVE-2026-119561
CVSS 4.0
7.6 HighCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS 3.1
6.8 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness
CWE-347
Updated
2026-11-02
EUVDEUVD-2026-113826 7.6

phpMyAdmin through 5.2.3 contains an authentication bypass vulnerability in CustomServer::parseAndValidateAssertionResponse() that never verifies WebAuthn assertion signatures against stored public keys. Attackers holding a victim's MySQL credentials can POST a crafted webauthn_request_response with matching challenge, origin, and rpIdHash to bypass the second factor and gain database privileges.

Record
EUVD-2026-113826
CVSS 4.0
7.6 HighCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-hmm7-jqq6-vwhr 7.6

phpMyAdmin through 5.2.3 contains an authentication bypass vulnerability in CustomServer:...

phpMyAdmin through 5.2.3 contains an authentication bypass vulnerability in CustomServer::parseAndValidateAssertionResponse() that never verifies WebAuthn assertion signatures against stored public keys. Attackers holding a victim's MySQL credentials can POST a crafted webauthn_request_response with matching challenge, origin, and rpIdHash to bypass the second factor and gain database privileges.

Record
GHSA-hmm7-jqq6-vwhr
CVSS 4.0
7.6 HighCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
6.8 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness
CWE-347
Updated
2026-11-02
NVD 7.6

phpMyAdmin through 5.2.3 contains an authentication bypass vulnerability in CustomServer::parseAndValidateAssertionResponse() that never verifies WebAuthn assertion signatures against stored public keys. Attackers holding a victim's MySQL credentials can POST a crafted webauthn_request_response with matching challenge, origin, and rpIdHash to bypass the second factor and gain database privileges.

Record
CVE-2026-119561
CVSS 4.0
7.6 HighCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
6.8 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness
CWE-347
Updated
2026-11-03
OSV 7.6

phpMyAdmin through 5.2.3 WebAuthn Two-Factor Authentication Bypass via CustomServer

phpMyAdmin through 5.2.3 contains an authentication bypass vulnerability in CustomServer::parseAndValidateAssertionResponse() that never verifies WebAuthn assertion signatures against stored public keys. Attackers holding a victim's MySQL credentials can POST a crafted webauthn_request_response with matching challenge, origin, and rpIdHash to bypass the second factor and gain database privileges.

Record
CVE-2026-119561
CVSS 4.0
7.6 HighCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Weakness
CWE-347
Updated
2026-11-05
OSVDEBIAN-CVE-2026-119561 8.1

phpMyAdmin through 5.2.3 contains an authentication bypass vulnerability in CustomServer::parseAndValidateAssertionResponse() that never verifies WebAuthn assertion signatures against stored public keys. Attackers holding a victim's MySQL credentials can POST a crafted webauthn_request_response with matching challenge, origin, and rpIdHash to bypass the second factor and gain database privileges.

Record
DEBIAN-CVE-2026-119561
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Updated
2026-11-04
OSVUBUNTU-CVE-2026-119561 7.6

phpMyAdmin through 5.2.3 contains an authentication bypass vulnerability in CustomServer::parseAndValidateAssertionResponse() that never verifies WebAuthn assertion signatures against stored public keys. Attackers holding a victim's MySQL credentials can POST a crafted webauthn_request_response with matching challenge, origin, and rpIdHash to bypass the second factor and gain database privileges.

Record
UBUNTU-CVE-2026-119561
CVSS 4.0
7.6 HighCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS 3.1
6.8 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Updated
2026-11-05

Affected products

Affected packages

Affected packages
PackageAffectedFixed
phpmyadmin
Debian:12
 All versions, plus listed versions
4:5.2.1+dfsg-14:5.2.1+dfsg-1+deb12u14:5.2.1+dfsg-24:5.2.1+dfsg-34:5.2.1+dfsg-4
Show 9 moreShow less
4:5.2.2-dev+759fe912a-14:5.2.2-really+dfsg-14:5.2.2-really+dfsg-24:5.2.2-really5.2.2+20241130+dfsg-14:5.2.2-really5.2.2+20241228+dfsg-14:5.2.2-really5.2.2+20250114+dfsg-14:5.2.2-really5.2.2+20250121+dfsg-14:5.2.3+dfsg-14:5.2.4~dev~git20260809.e0909b211b+dfsg-1
 None known
phpmyadmin
Debian:13
 All versions, plus listed versions
4:5.2.2-really+dfsg-14:5.2.2-really+dfsg-1+deb13u14:5.2.2-really+dfsg-24:5.2.3+dfsg-14:5.2.4~dev~git20260809.e0909b211b+dfsg-1
 None known
phpmyadmin
Debian:14
 All versions, plus listed versions
4:5.2.2-really+dfsg-14:5.2.2-really+dfsg-24:5.2.3+dfsg-14:5.2.4~dev~git20260809.e0909b211b+dfsg-1
 None known
phpmyadmin
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
4:4.0.6-14:4.0.8-14:4.0.9-14:4.0.10-14:4.0.10-1ubuntu0.1
Show 4 moreShow less
4:4.0.10-1ubuntu0.1+esm14:4.0.10-1ubuntu0.1+esm24:4.0.10-1ubuntu0.1+esm34:4.0.10-1ubuntu0.1+esm4
 None known
phpmyadmin
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
4:4.4.13.1-14:4.5.0.2-24:4.5.1-14:4.5.1-24:4.5.1-3
Show 13 moreShow less
4:4.5.2-14:4.5.2-24:4.5.3.1-14:4.5.4-14:4.5.4.1-24:4.5.4.1-2ubuntu14:4.5.4.1-2ubuntu24:4.5.4.1-2ubuntu2.14:4.5.4.1-2ubuntu2.1+esm24:4.5.4.1-2ubuntu2.1+esm34:4.5.4.1-2ubuntu2.1+esm44:4.5.4.1-2ubuntu2.1+esm54:4.5.4.1-2ubuntu2.1+esm6
 None known
phpmyadmin
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
4:4.6.6-54:4.6.6-5ubuntu0.2+esm14:4.6.6-5ubuntu0.2+esm24:4.6.6-5ubuntu0.54:4.6.6-5ubuntu0.5+esm1
 None known
phpmyadmin
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
4:4.9.1+dfsg1-24:4.9.2+dfsg1-14:4.9.5+dfsg1-1ubuntu14:4.9.5+dfsg1-24:4.9.5+dfsg1-2ubuntu0.1~esm1
 None known
phpmyadmin
Ubuntu:22.04:LTS
 All versions, plus listed versions
4:5.0.4+dfsg2-2ubuntu54:5.1.1+dfsg1-5ubuntu1
 None known
phpmyadmin
Ubuntu:24.04:LTS
 All versions, plus listed versions
4:5.2.1+dfsg-1ubuntu14:5.2.1+dfsg-2ubuntu14:5.2.1+dfsg-2ubuntu24:5.2.1+dfsg-3
 None known
phpmyadmin
Ubuntu:26.10
 All versions, plus listed versions
4:5.2.3+dfsg-14:5.2.4~dev~git20260809.e0909b211b+dfsg-1
 None known
phpmyadmin
Ubuntu:26.04:LTS
 All versions, plus listed versions
4:5.2.2-really+dfsg-24:5.2.3+dfsg-1
 None known

History

History
RecordedChangedSources
affected, aliases, referencesOSV
facts, referencesNVD
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-119561 is a high vulnerability (CVSS 7.6) in Phpmyadmin, published October 30, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 10th percentile. No source names a fixed version.

References

Show 5 moreShow less
Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open