# CVE-2026-73552: Envoy Proxy multiple vulnerabilities

Source: https://junglewise.ai/threats/cve-2026-73513-envoy-proxy-multiple-vulnerabilities  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-21. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-73552 · Severity: high · CVSS 7.5 · Published 2026-09-21

A series of vulnerabilities were discovered in Envoy Proxy, a widely-used service mesh and proxy component in cloud environments. These vulnerabilities could allow attackers to compromise service mesh configurations, intercept traffic, or gain unauthorized access to network services running on affected infrastructure.

Technologies: [Envoy Proxy](https://junglewise.ai/threats/technologies/envoy-proxy), [Google Cloud Platform](https://junglewise.ai/threats/technologies/google-cloud-platform). Vendors: [Envoy](https://junglewise.ai/threats/vendors/envoy), [Google](https://junglewise.ai/threats/vendors/google).

## Quick answers

**Is CVE-2026-73552 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-73552 being exploited in the wild.

**How severe is CVE-2026-73552?** High severity, with a CVSS score of 7.5, published 21 September 2026.

**Which products and versions are affected?** Envoy Envoy Proxy.

**Is there a fix for CVE-2026-73552?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-73552 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-73552?** Check whether you run Envoy Proxy or Google Cloud Platform. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

Multiple security vulnerabilities were identified in Envoy Proxy as tracked under 13 distinct CVE identifiers (CVE-2026-73513, CVE-2026-73552, CVE-2026-73512, CVE-2026-73547, CVE-2026-73549, CVE-2026-50572, CVE-2026-73546, CVE-2026-48521, CVE-2026-73551, CVE-2026-73511, CVE-2026-73548, CVE-2026-73550, CVE-2026-73553). The vulnerabilities span moderate to high severity ratings. Specific technical details regarding vulnerability class, attack vectors, and preconditions are not disclosed in the available advisory excerpt. Details and remediation guidance are available in the Cloud Service Mesh security bulletin. The advisory does not indicate active exploitation in the wild at the time of publication.

## Affected products

- Envoy Envoy Proxy

## Identifiers

- CVE-2026-73552
- CVE-2026-73511
- CVE-2026-73546
- CVE-2026-73548
- CVE-2026-73551
- CVE-2026-73547
- CVE-2026-73549
- CVE-2026-48521
- CVE-2026-50572
- CVE-2026-73513
- CVE-2026-73550
- CVE-2026-73553
- CVE-2026-73512

## Timeline

- 2026-08-26: disclosed

## References

- [https://docs.cloud.google.com/support/bulletins/index](https://docs.cloud.google.com/support/bulletins/index)

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