Dashboard / CVE-2026-126436

CVE-2026-126436

HIGH
MEDIUM Priority: 0.03 BB Relevance: 77/100
Published: 2026-11-13 Modified: 2026-11-13 First seen: 2026-11-13 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
AT: None
VC: High
VI: None
VA: None

Description

OpenEMR before 8.5.0 contains an authorization bypass vulnerability that allows OAuth2 clients to use unregistered grant types because oauth_clients.grant_types is never enforced. Attackers can request tokens with grant_type=password to bypass the user consent screen, and disabled clients can redeem authorization codes using JWT client assertions.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
openemr openemr 0 < 8.5.0
openemr openemr 0 < 8.5.0

References & Advisories (2)

Bug Bounty Relevance

77 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

8.7 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS — Exploitation Probability

0.39%
Raw Score 0.003860
Percentile 33.2%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00386
2026-11-13
0.00434

Intelligence Sources

mitre ref →
nvd ref →

External Links