CVE-2026-74244
Description
A flaw was found in Red Hat Quay's Stripe billing webhook handler. This vulnerability allows an unauthenticated attacker to forge billing events by sending crafted JSON requests to the /webhooks/stripe endpoint without validating the Stripe-Signature header. Successful exploitation can lead to the unauthorized resetting of a namespace's build quota to its maximum and trigger unsolicited billing emails to namespace administrators.
Statement
This Moderate flaw in Red Hat Quay's Stripe billing webhook handler allows unauthenticated attackers to forge billing events due to missing signature validation. This can lead to unauthorized build quota resets and unsolicited billing emails to namespace administrators, impacting resource availability and user experience. The vulnerability is present even when the billing feature is disabled, though its impact is reduced in self-hosted deployments utilizing FakeStripe.
Mitigation
To mitigate this vulnerability, restrict network access to the `/webhooks/stripe` endpoint in Red Hat Quay. Configure network firewalls to allow connections to this endpoint only from trusted Stripe IP addresses or block access if Stripe billing integration is not utilized. This prevents unauthenticated attackers from forging billing events. Ensure any network changes are applied and services are reloaded or restarted as necessary for the changes to take effect, which may temporarily impact Quay service availability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.9 | N/A | 5.9 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | High | N/A | High |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | None |
| Integrity Impact | High | N/A | High |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
cve.org: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Understanding the Weakness (CWE)
Access Control,Integrity,Confidentiality
Technical Impact: Gain Privileges or Assume Identity; Modify Application Data; Execute Unauthorized Code or Commands
An attacker could gain access to sensitive data and possibly execute unauthorized code.
Acknowledgements
Red Hat would like to thank meifukun (https://github.com/meifukun) for reporting this issue.
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