Auth bypass in Hoppscotch
CVE-2026-28217
hoppscotch is an open source API development ecosystem. Prior to version 2026.2.0, the `userCollection` GraphQL query accepts an arbitrary collection ID and returns the full collection data — including title, type, and the serialized `data` field containing HTTP requests with headers and potentially secrets — to any authenticated user, without verifying that the requesting user owns the collection. This is an Insecure Direct Object Reference (IDOR) caused by a missing authorization check that exists on every other operation in the same resolver. Version 2026.2.0 fixes the issue.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (29.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Hoppscotch — versions < 2026.2.0
Weakness classification (CWE)
References
- github.com/hoppscotch/hoppscotch/security/advisories/GHSA-m5pg-r4jp-qq75 (Exploit, Mitigation, Vendor Advisory)
- github.com/hoppscotch/hoppscotch/releases/tag/2026.2.0 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-28217?
- CVE-2026-28217 is a medium-severity vulnerability in Hoppscotch, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-02-26.
- How severe is CVE-2026-28217?
- Medium severity. CVSS v3 base score is 6.5 out of 10.