Description
corydolphin/flask-cors version 4.0.1 contains an improper regex path matching vulnerability. The plugin prioritizes longer regex patterns over more specific ones when matching paths, which can lead to less restrictive CORS policies being applied to sensitive endpoints. This mismatch in regex pattern priority allows unauthorized cross-origin access to sensitive data or functionality, potentially exposing confidential information and increasing the risk of unauthorized actions by malicious actors.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| corydolphin | corydolphin/flask-cors | unspecified – ≤ latest | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | python-flask-cors | 6.0.1-1 | — |
| Debian 13 | python-flask-cors | 6.0.1-1 | — |
| Debian 12 | python-flask-cors | 3.0.10-2+deb12u1 | — |
| Debian 11 | python-flask-cors | 3.0.9-2+deb11u1 | DLA-4197-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | python-flask-cors | 3.0.9-2ubuntu0.1 | USN-7612-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | python-flask-cors | 4.0.0-1ubuntu0.1~esm1 | USN-7612-1 |
| Ubuntu Pro 20.04 LTS | python-flask-cors | 3.0.8-2ubuntu0.1+esm1 | USN-7612-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | python-Flask-Cors | 6.0.2-1.1 | openSUSE-SU-2026:10485-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | kubeflow-jupyter-web-app | 1.10.0-r3 | — |
| Wolfi rolling | kubeflow-volumes-web-app | 1.10.0-r2 | — |
| Wolfi rolling | superset-6.0 | 6.0.0-r2 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | flask-cors | < 6.0.0 | 6.0.0 | GHSA-7rxf-gvfg-47g4 |
Advisories 3
- USN-7612-1 python-flask-cors vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- openSUSE-SU-2026:10485-1 python311-Flask-Cors-6.0.2-1.1 on GA media SUSE / openSUSE Security Updates · Apr 4, 2026
- DLA-4197-1 python-flask-cors - security update Debian Security (DSA / DLA) · Mar 9, 2026