CVE-2026-56295

Capgo - Policy Enforcement Bypass in Webhook Management Endpoints via Non-Expiring API Keys

Published Jun 20, 2026 CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Description

Capgo before 12.128.2 contains an authorization bypass vulnerability in webhook management endpoints that allows non-expiring API keys to bypass the require_apikey_expiration organization policy. The checkWebhookPermission function fails to call apikeyHasOrgRightWithPolicy, enabling attackers with legacy non-expiring keys to list, create, and delete webhooks despite explicit organizational policy requiring key expiration.

Analysis

Technical impact

Capgo before version 12.128.2 contains an authorization bypass flaw in its webhook management APIs. The function responsible for checking permissions, checkWebhookPermission, skips a call to apikeyHasOrgRightWithPolicy, so requests made with legacy, non‑expiring API keys are not subjected to the organization policy that requires key expiration. As a result, an attacker who possesses such a legacy key can list, create, or delete webhooks regardless of the policy, effectively gaining elevated control over webhook configuration within the application.

Affected Systems

The affected product is Capgo, and the vulnerability exists in all releases prior to 12.128.2. No other versions or products are listed as impacted.

Risk and Exploitability

The CVSS score of 5.3 indicates a moderate severity. EPSS data is not available, and the vulnerability is not listed in the CISA KEV catalog. Attackers must obtain or already hold a legacy, non‑expiring API key; once they have such a key, they can remotely bypass the organization’s webhook policy, allowing unauthorized creation or deletion of webhooks. The risk is contingent on the presence of legacy keys and the sensitivity of the data or actions that can be performed via webhooks.

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 apply the authorization fix.
Revoke all legacy non‑expiring API keys and issue new keys that comply with the organization’s key‑expiration policy.
Re‑enable the require_apikey_expiration policy enforcement in Capgo configuration or database to block legacy key usage.

Generated by OpenCVE AI on June 20, 2026 at 17:51 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 Low

Vulnerable System Integrity Impact Low

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 Low

Integrity Impact Low

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% (0.312% probability within 30 days)

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
https://github.com/Cap-go/capgo/security/advisories/GHSA-vwpp-cqv5-cmfm
https://www.vulncheck.com/advisories/capgo-policy-enforcement-bypass-in-webhook-management-endpoints-via-non-expiring-api-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 22, 2026 7:30 PM Scoring metrics updated View changes

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

Jun 20, 2026 4:15 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 webhook management endpoints that allows non-expiring API keys to bypass the require_apikey_expiration organization policy. The checkWebhookPermission function fails to call apikeyHasOrgRightWithPolicy, enabling attackers with legacy non-expiring keys to list, create, and delete webhooks despite explicit organizational policy requiring key expiration.
Title		Capgo - Policy Enforcement Bypass in Webhook Management Endpoints via Non-Expiring API Keys
Weaknesses		CWE-285
References		https://github.com/Cap-go/capgo/security/advisories/GHSA-vwpp-cqv5-cmfm https://www.vulncheck.com/advisories/capgo-policy-enforcement-bypass-in-webhook-management-endpoints-via-non-expiring-api-keys
Metrics		cvssV3_1 `{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'}` cvssV4_0 `{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N'}`