CVE-2026-56225

Capgo - Authorization Bypass in API Key Management via App-Limited Keys

Published Jun 23, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed

Description

Capgo before 12.128.2 contains an authorization bypass vulnerability in its public API key management handlers (get/put/delete/post). API keys created with mode=all but restricted to a single app via limited_to_apps are only checked for limited_to_orgs and not for limited_to_apps, so an app-scoped key can enumerate, update, and delete sibling API keys belonging to the same account that are outside its declared app scope, enabling tampering with account-level credentials.

Analysis

Technical impact

Capgo versions earlier than 12.128.2 allow an attacker to use any API key created in mode=all but restricted to a single app via limited_to_apps to enumerate, modify, or delete other sibling API keys belonging to the same account. This bypass of the intended app scope grants the attacker the ability to tamper with account‑level credentials, effectively elevating privileges and compromising the confidentiality and integrity of the account.

Affected Systems

Capgo software running any release prior to 12.128.2 is vulnerable; the issue is in the public API key management handlers for get/put/delete/post operations where the limited_to_apps restriction is ignored.

Risk and Exploitability

The vulnerability carries a CVSS score of 8.7, indicating high severity. No EPSS score is available and it is not listed in CISA KEV, but the flaw can be exercised by any user who possesses an app‑scoped API key, a relatively easy prerequisite. An attacker can enumerate, change, or delete sibling keys without further authentication, providing a straightforward path to gain broader account access.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Capgo

unaffected

Version	Status	Constraints
`0`	affected	< 12.128.2
`12.128.2`	unaffected	—

No data.

Vendor Product Versions

Cap-go

Version	Status	Scheme	Platform
`[0,12.128.2)`	affected	semver	—
`12.128.2`	unaffected	semver	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade Capgo to version 12.128.2 or later to fix the authorization bypass.
Revoke and regenerate all API keys that were created with limited_to_apps, ensuring that new keys have the correct scope and no global mode unless explicitly required.
Implement monitoring of API key creation, modification, and deletion events, and enforce least privilege by limiting keys to only the applications they need.

Generated by OpenCVE AI on June 23, 2026 at 13:26 UTC.

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.369% probability within 30 days)

Exploitation poc

Automatable no

Technical Impact total

References

Link	Providers
https://github.com/Cap-go/capgo/security/advisories/GHSA-hwc7-j2p6-43xp
https://www.vulncheck.com/advisories/capgo-authorization-bypass-in-api-key-management-via-app-limited-keys

History

Jun 24, 2026 4:45 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Cap-go Cap-go cap-go
Vendors & Products		Cap-go Cap-go cap-go

Jun 23, 2026 1:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Jun 23, 2026 12:45 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		Capgo before 12.128.2 contains an authorization bypass vulnerability in its public API key management handlers (get/put/delete/post). API keys created with mode=all but restricted to a single app via limited_to_apps are only checked for limited_to_orgs and not for limited_to_apps, so an app-scoped key can enumerate, update, and delete sibling API keys belonging to the same account that are outside its declared app scope, enabling tampering with account-level credentials.
Title		Capgo - Authorization Bypass in API Key Management via App-Limited Keys
Weaknesses		CWE-269
References		https://github.com/Cap-go/capgo/security/advisories/GHSA-hwc7-j2p6-43xp https://www.vulncheck.com/advisories/capgo-authorization-bypass-in-api-key-management-via-app-limited-keys
Metrics		cvssV3_1 `{'score': 8.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L'}` cvssV4_0 `{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N'}`