StubZero: $148,337 RCE in Google Cloud Production
A recent vulnerability in Google Cloud's production environment allowed for remote code execution due to an API information leak. The issue was identified as CVE-2026-2031 and was discovered through automated fuzzing tools. This incident highlights significant security concerns regarding internal API endpoints and their potential exposure of sensitive information.
- ▪The vulnerability was initially detected in an API endpoint responding with status 200 to suspicious requests.
- ▪The endpoint allowed access to internal protobuf definitions, which could disclose sensitive request and response data.
- ▪The issue was exacerbated by the ability to manipulate query parameters to extract further information from the API.
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Story provenance
Source · retrieval · rights · ranking — open for full record
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Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | Brutecat |
| Canonical URL | https://brutecat.com/articles/google-cloud-rce/ |
| Publication time | Mon, 25 May 2026 17:31:41 +0000 |
| Retrieval time | 2026-05-25T17:37:39.277Z |
| Last seen | 2026-05-25T17:37:39.277Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | kmvdlXeRQjlg |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
What started as a debugging endpoint info leak escalated into full remote code execution on Google Cloud's production environment. Three months later, it happened again. This vulnerability was assigned CVE-2026-2031. This story starts with one of my automated fuzzing tools alerting me about the API cloudcrmipfrontend-pa.googleapis.com, as it was responding with status 200 to some suspicious endpoints. On further inspection, the API seems to have several public debugging endpoints: Screenshot from an internal API explorer tool I built for testing internal Google APIs from a discovery document #req2proto as a Service™Some of the endpoints like GET /v1/integrationPlatform:listServicesByServer seemed to always return internal server error.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Brutecat.
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