CVE-2026-126377 PUBLISHED

Vvveb before 1.0.9.0 Cookie Forgery via PHP Type Juggling in generateCookie()

Assigner: VulnCheck
Reserved: 10.11.2026 Published: 13.11.2026 Updated: 13.11.2026

Vvveb before 1.0.9.0 contains an authentication bypass vulnerability in generateCookie() in system/user/user.php that uses loose comparison to validate MD5 cookie hashes. Unauthenticated attackers can brute-force cookie values until the server's MD5 computation yields a 0e magic hash, then forge persistent cookies for account takeover.

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 9.2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	High	Integrity	High	Integrity	None
Attack Requirements	Present	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 8.1

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	givanz
Product	Vvveb
Versions	Default: unaffected affected from 0 to 1.0.9.0 (excl.) Version 1.0.9.0 is unaffected

CVE-2026-126377 PUBLISHED

Vvveb before 1.0.9.0 Cookie Forgery via PHP Type Juggling in generateCookie()

Metrics

Product Status

Credits

References

Problem Types