RUSTSEC-2026-0448 (GHSA-QPH8-7859-GQ2F)

Vulnerability from osv_rustsec – Published: 2026-11-06 12:00 – Updated: 2026-11-06 14:42 – Source website
VLAI
Summary
Unbounded decompression can exhaust memory and CPU resources
Details

The encoding::Decoder stream can expand compressed input into a large output buffer before a caller can enforce its body size limit. An attacker who controls a compressed request or response can cause excessive memory allocation and CPU use, resulting in denial of service.

This affects applications that decode untrusted gzip, deflate, Brotli, or Zstandard bodies with the corresponding compression feature enabled.

Upgrade to actix-http 3.20.1 or later and configure Decoder::limit() when using the decoder directly. Actix Web users must also upgrade to actix-web 4.18.2 or later so that extractors pass their limits to the decoder.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "denial-of-service"
        ],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "actix-http",
        "purl": "pkg:cargo/actix-http"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "3.20.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-qph8-7859-gq2f"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "The `encoding::Decoder` stream can expand compressed input into a large output\nbuffer before a caller can enforce its body size limit. An attacker who controls\na compressed request or response can cause excessive memory allocation and CPU\nuse, resulting in denial of service.\n\nThis affects applications that decode untrusted gzip, deflate, Brotli, or Zstandard\nbodies with the corresponding compression feature enabled.\n\nUpgrade to actix-http 3.20.1 or later and configure `Decoder::limit()` when using\nthe decoder directly. Actix Web users must also upgrade to actix-web 4.18.2 or\nlater so that extractors pass their limits to the decoder.",
  "id": "RUSTSEC-2026-0448",
  "modified": "2026-11-06T14:42:53Z",
  "published": "2026-11-06T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/actix-http"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0448.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/actix/actix-web/commit/41b54d23ea04f66758c15de7e4ab18325cd25280"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "Unbounded decompression can exhaust memory and CPU resources"
}



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