| Titolo | Envoy >= 1.33.0 Injection (CWE-74) |
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| Descrizione | The header_mutation filter's query_parameter_mutations feature inserts values from formatters (such as %REQ(header)%) into query strings without URL encoding. Attacker-controlled header values containing & or = characters inject arbitrary query parameters. For example, a header value of legit&admin=true results in two query parameters instead of one. Other Envoy filters (OAuth2, gRPC transcoder) correctly use PercentEncoding::urlEncode() for this same operation. Root cause at header_mutation.cc:22 (params.add() without encoding) and utility.cc:1156 (toString() outputs raw values). Fix adds URL encoding controlled by runtime guard envoy.reloadable_features.header_mutation_url_encode_query_params.
https://github.com/envoyproxy/envoy/pull/43502 (merged 2026-02-18). Vendor contacted, acknowledged, and fixed. No CVE assigned. Not submitted to another CNA. |
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| Fonte | ⚠️ https://github.com/envoyproxy/envoy/pull/43502 |
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| Utente | lukefr09 (UID 97110) |
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| Sottomissione | 04/04/2026 22:31 (4 mesi fa) |
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| Moderazione | 24/04/2026 21:49 (20 days later) |
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| Stato | Accettato |
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| Voce VulDB | 359546 [Envoy fino a 1.33.0 Query Parameter header_mutation.cc params.add escalationi di privilegi] |
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| Punti | 20 |
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