Quick answers
- Is CVE-2026-47879 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-47879 being exploited in the wild.
- How severe is CVE-2026-47879?
- High severity, with a CVSS score of 7.7, published 27 August 2026.
- Which products and versions are affected?
- VMware Spring Cloud Gateway 5.0.0 through 5.0.2, 4.3.0 through 4.3.5, 4.0.0 through 4.2.9, and 3.1.13 and earlier.
- Is there a fix for CVE-2026-47879?
- 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-2026-47879 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-47879?
- Check whether you run VMware Spring Cloud Gateway at an affected version. 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
The vulnerability exists in the JsonToGrpcGatewayFilterFactory class, which fails to properly validate and restrict Spring Resource locations used for loading protobuf (proto) descriptor files. An attacker can craft requests that specify arbitrary resource paths (such as file://, classpath:/, or other Spring resource protocols) to access unintended files on the system. The vulnerability requires network access to the affected gateway endpoint and does not require prior authentication. By exploiting this, an attacker can read sensitive files or gain insight into the application's configuration and classpath resources.
Affected products
- VMware Spring Cloud Gateway 5.0.0 through 5.0.2, 4.3.0 through 4.3.5, 4.0.0 through 4.2.9, and 3.1.13 and earlier
Timeline
- 2026-08-27: disclosed