CVE-2026-28217Public exploitNetwork attack vector

Authenticated collection disclosure via missing ownership check

Published Feb 26, 2026 · Updated Feb 26, 2026

Missing authorization in Hoppscotch before 2026.2.0 allows remote authenticated users to read other users' private API collections. The userCollection resolver passes an attacker-supplied collection ID to getUserCollection, which performs a unique-ID lookup without filtering on the authenticated user's identity. Any account with a victim collection ID can retrieve its title, owner UID, hierarchy, and serialized requests, including stored headers and secrets.

CVSS severity6.5
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Hoppscotch before 2026.2.0 allows remote authenticated users to read other users' private API collections. The userCollection resolver passes an attacker-supplied collection ID to getUserCollection, which performs a unique-ID lookup without filtering on the authenticated user's identity. Any account with a victim collection ID can retrieve its title, owner UID, hierarchy, and serialized requests, including stored headers and secrets.

The record

CVE
CVE-2026-28217
Published
Feb 26, 2026
Updated
Feb 26, 2026
Vendor
Hoppscotch
Product
Hoppscotch
Classifications
CWE-862, CWE-639, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2026.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Hoppscotch · Hoppscotchversion=< 2026.2.0

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-639Authorization Bypass Through User-Controlled Key
T1213Data from Information Repositories

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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