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CVE-2026-0650

32
FAUCET Score

CVE-2026-0650 is a critical authentication bypass vulnerability affecting OpenFlagr versions up to and including 1.1.18. Due to improper path normalization in the HTTP middleware's whitelist logic, unauthenticated attackers can craft requests to bypass security controls and access protected API endpoints. This unauthorized access could lead to the modification of feature flags and the export of sensitive data, posing a significant risk to data confidentiality and integrity. The vulnerability carries a CVSSv4 score of 9.3 (CRITICAL), indicating a severe threat with a network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. No user interaction is required for exploitation. Currently, there is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage for this CVE are minimal, suggesting low public awareness at this time.

Impacted Technologies

VendorProductVersion(s)CPE
OpenFlagrFlagr
>= 0, <= 1.1.18CNA affecteddefault unaffected

CVSS Data

CVSS version used by this source: 4.0

9.3CRITICAL

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.44%
Probability of exploitation in next 30 days
EPSS Percentile
35.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0044 is in the 13th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

gopatch availablevia ghsa
Product: github.com/openflagr/flagrFixed in: 0.0.0-20251009103504-fe83dc87aa40

Vendor Advisories (1)

goGHSA-rwp9-5g7q-73q3critical

OpenFlagr contains an authentication bypass vulnerability in the HTTP middleware

Jan 7, 2026

References

dreyand.rs / code%20review/golang/2026/01/03/0day-speedrun-openflagr-less-1118-authentication-bypass
github.com / openflagr/flagr/releases/tag/1.1.19
vulncheck.com / advisories/openflagr-authentication-bypass-via-prefix-whitelist-path-normalization