CVE-2026-129134

MRBS before 1.13.0 Password Reset Poisoning via Host Header Injection

8.6 High

MRBS before 1.13.0 contains a password reset poisoning vulnerability that allows unauthenticated attackers to redirect reset links by forging the Host header when $url_base is unset. Attackers can request a reset for a victim so AuthDb::notifyUser() emails a link pointing to their host, capturing the reset key when opened to take over accounts including administrators.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Passive

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: None

What each source reports

CVE List Score used8.6

MRBS before 1.13.0 Password Reset Poisoning via Host Header Injection

Record: CVE-2026-129134
CVSS 4.0: 8.6 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/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:N/UI:R/S:U/C:H/I:H/A:N
Weakness: CWE-640
Updated: 2026-11-13

EUVDEUVD-2026-1255458.6

Record: EUVD-2026-125545
CVSS 4.0: 8.6 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Updated: 2026-11-13

GitHub AdvisoriesGHSA-2x54-phff-qr648.6

MRBS before 1.13.0 contains a password reset poisoning vulnerability that allows unauthenticated...

Record: GHSA-2x54-phff-qr64
CVSS 4.0: 8.6 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/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: 8.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Weakness: CWE-640
Updated: 2026-11-13

NVD8.6

Record: CVE-2026-129134
CVSS 4.0: 8.6 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/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: 8.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Weakness: CWE-640
Updated: 2026-11-13

Affected products

meeting-room-booking-system mrbs-code

History

History
Recorded	Changed	Sources
Nov 13, 2026	published	EUVD
Nov 13, 2026	published	EUVD, NVD
Nov 13, 2026	aliases, references	GitHub Advisories
Nov 13, 2026	aliases, published	EUVD
Nov 13, 2026	first indexed	CVE List

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

In short

CVE-2026-129134 is a high vulnerability (CVSS 8.6) in Meeting-room-booking-system Mrbs-code, published November 13, 2026. No source lists public exploit code. No source names a fixed version.