PT-2026-1559 · Openflagr · Openflagr

Dreyand · Published 2026-01-07 · Updated 2026-01-17 · CVE-2026-0650

Positive Technologies (AI Summary)

CVSS v4.0

9.3

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions OpenFlagr versions prior to and including 1.1.18

Description The software contains an authentication bypass issue in the HTTP middleware. Improper path normalization within the whitelist logic allows crafted requests to bypass authentication, granting access to protected API endpoints without valid credentials. This unauthorized access could potentially allow modification of feature flags and the export of sensitive data.

Recommendations Update to a version later than 1.1.18.

Exploit

Fix

Missing Authentication

Weakness Enumeration

CWE-425

CWE-306

Related Identifiers

CVE-2026-0650

GHSA-RWP9-5G7Q-73Q3

GO-2026-4286

SUSE-SU-2026:0142-1

Affected Products

Openflagr

References · 48

• 🔥 https://dreyand.rs/code%20review/golang/2026/01/03/0day-speedrun-openflagr-less-1118-authentication-bypass · Exploit
• https://github.com/openflagr/flagr/releases/tag/1.1.19 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2026:0142-1 · Vendor Advisory
• https://osv.dev/vulnerability/GO-2026-4286 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-0650 · Security Note
• https://osv.dev/vulnerability/CVE-2026-0650 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-rwp9-5g7q-73q3 · Vendor Advisory
• https://github.com/openflagr/flagr/commit/fe83dc87aa404a57554aa5839ac450f55c203570 · Note
• https://github.com/openflagr/flagr · Note
• https://suse.com/security/cve/CVE-2017-18895 · Note
• https://github.com/advisories/GHSA-rwp9-5g7q-73q3 · Note
• https://suse.com/security/cve/CVE-2017-18905 · Note
• https://suse.com/security/cve/CVE-2026-22253 · Note
• https://twitter.com/0dayPublishing/status/2008764507577856281 · Twitter Post
• https://suse.com/security/cve/CVE-2017-18904 · Note