A flaw was found in 3Scale APICast in versions prior to 2.11.0, where it incorrectly…
Priority LOW 34CWE-281Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
A flaw was found in 3Scale APICast in versions prior to 2.11.0, where it incorrectly identified connections for reuse. This flaw allows an attacker to bypass security restrictions for an API request when hosting multiple APIs on the same IP address.
Why it matters now
EPSS 0.00849 58th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | apicast | 3scale-apicast versions prior to 2.11.0 | — | No fix listed | CNA |
- apicast Vendor— Affected 3scale-apicast versions prior to 2.11.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 1 product
- Red Hat 3scale API Management Platform 2
Timeline
- 2026-10-02 Threatist record created from CVE-2021-3523
- 2026-10-03 Alias added: GHSA-wxqh-rqgc-pfr9
References
More Red Hat Apicast vulnerabilities
- TI-2023-00431 Apicast proxies the api call with incorrect jwt token to the api backend without proper authorization check CVSS 3.1HIGH 7.5
Sources
- CVE-2021-3523 · CVE Program
- CVE-2021-3523 · NVD
- FIRST EPSS
- GHSA-wxqh-rqgc-pfr9 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-3523 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences