Case-Insensitive Path Matching in corydolphin/flask-cors (corydolphin corydolphin/flask-cors)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.72 % · percentile 54 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- @huntr_ai
- NVD status
- Modified
Description
corydolphin/flask-cors version 4.01 contains a vulnerability where the request path matching is case-insensitive due to the use of the `try_match` function, which is originally intended for matching hosts. This results in a mismatch because paths in URLs are case-sensitive, but the regex matching treats them as case-insensitive. This misconfiguration can lead to significant security vulnerabilities, allowing unauthorized origins to access paths meant to be restricted, resulting in data exposure and potential data leaks.
Weaknesses (CWE)
- CWE-178 — Improper Handling of Case Sensitivity
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.0 | MEDIUM 5.3 | CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N | @huntr_ai |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | NVD · nvd@nist.gov (Primary) |
| CVSS 3.0 | MEDIUM 5.3 | CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N | NVD · security@huntr.dev (Secondary) |
Advisories
- GHSA-43qf-4rqw-9q2g — Flask-CORS vulnerable to Improper Handling of Case Sensitivity
- PYSEC-2026-1383 — Flask-CORS vulnerable to Improper Handling of Case Sensitivity
European references
- ENISA EUVD · EUVD-2025-6979
- GCVE · GCVE-0-2024-6866
CERT-FR advisories
- CERTFR-2026-AVI-0606 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0896 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:flask-cors_project:flask-cors:4.0.1:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| corydolphin · corydolphin/flask-cors | affected unspecified ≤ latest |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |