Security readout for executives and security teams
Plain-English summary
Hoppscotch before 2026.2.0 could let any logged-in user view another user’s private collection if they know or obtain its collection ID. Collections may include API request details, headers, and possible secrets. This is primarily a confidentiality risk, not a system takeover issue.
Executive priority
Treat as a timely confidentiality fix. Prioritize environments with many users, shared workspaces, or stored API secrets. Upgrade during the next urgent maintenance window, and rotate any secrets that may have been stored in private collections.
Technical view
CVE-2026-28217 is a CWE-862 missing authorization check in the Hoppscotch GraphQL `userCollection` query. The query accepted arbitrary collection IDs and returned full collection data without verifying ownership. CVSS is 6.5: network-accessible, low complexity, authenticated access required, high confidentiality impact, no integrity or availability impact.
Likely exposure
Self-hosted or managed Hoppscotch deployments running versions earlier than 2026.2.0 are potentially exposed. Risk depends on whether untrusted or broad user populations have authenticated access and whether collections contain sensitive headers, tokens, or API data.
Exploitation context
Sources do not report active exploitation, and the CVE is not marked KEV. Exploitation requires authentication and a valid collection ID. If collection identifiers are exposed through logs, sharing workflows, URLs, or prior access, the confidentiality impact could be significant.
Researcher notes
The advisory states the missing ownership check affected `userCollection`, while other operations in the resolver had authorization checks. Evidence supports authenticated IDOR with high confidentiality impact. No public source in the bundle confirms exploit activity or additional affected products.
Mitigation direction
- Upgrade Hoppscotch to version 2026.2.0 or later.
- Review vendor advisory and release notes for deployment-specific guidance.
- Rotate secrets stored in exposed or sensitive Hoppscotch collections.
- Limit Hoppscotch access to trusted users until patched.
Validation and detection
- Inventory Hoppscotch instances and confirm running version.
- Identify whether any instance is below 2026.2.0.
- Review collection contents for tokens, headers, or credentials.
- Check access logs for unusual authenticated collection access patterns.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-28217 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/hoppscotch/hoppscotch/security/advisories/GHSA-m5pg-r4jp-qq75CVE reference · x_refsource_CONFIRM
- https://github.com/hoppscotch/hoppscotch/releases/tag/2026.2.0CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.