CVE-2026-126377

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

Published Nov 13, 2026 CVSS 4.0 · 9.2 Critical EPSS n/a KEV · Not listed

Description

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

givanz

Vvveb

unaffected

Version	Status	Constraints
`0`	affected	< 1.0.9.0
`1.0.9.0`	unaffected	—

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity High

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/givanz/Vvveb/security/advisories/GHSA-p8w8-2rq6-wm2g
https://www.vulncheck.com/advisories/vvveb-before-1.0.9.0-cookie-forgery-via-php-type-juggling-in-generatecookie

History

Nov 13, 2026 9:45 AM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		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.
Title		Vvveb before 1.0.9.0 Cookie Forgery via PHP Type Juggling in generateCookie()
First Time appeared		Vvveb Vvveb vvveb
Weaknesses		CWE-287
CPEs		cpe:2.3:a:vvveb:vvveb::::::::
Vendors & Products		Vvveb Vvveb vvveb
References		https://github.com/givanz/Vvveb/security/advisories/GHSA-p8w8-2rq6-wm2g https://www.vulncheck.com/advisories/vvveb-before-1.0.9.0-cookie-forgery-via-php-type-juggling-in-generatecookie
Metrics		cvssV3_1 `{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}` cvssV4_0 `{'score': 9.2, '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'}`