RUSTSEC-2026-0447 (GHSA-QPH8-7859-GQ2F)

Vulnerability from osv_rustsec – Published: 2026-11-06 12:00 – Updated: 2026-11-06 14:42 – Source website
VLAI
Summary
Compressed request bodies can exhaust memory before extractor limits apply
Details

Body extractors do not pass their size limits to the decompression layer. A small compressed request can therefore cause a large allocation before the extractor rejects the decoded body. A remote attacker can use this to exhaust memory or CPU resources and cause denial of service.

This affects applications that read compressed request bodies with the corresponding compression feature enabled.

Upgrade to actix-web 4.18.2 or later with actix-http 3.20.1 or later. As a workaround, reject compressed request bodies at a reverse proxy or in middleware before body extraction.

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-web",
        "purl": "pkg:cargo/actix-web"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "4.18.2"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-qph8-7859-gq2f"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "Body extractors do not pass their size limits to the decompression layer.\nA small compressed request can therefore cause a large allocation before the\nextractor rejects the decoded body. A remote attacker can use this to exhaust\nmemory or CPU resources and cause denial of service.\n\nThis affects applications that read compressed request bodies with the\ncorresponding compression feature enabled.\n\nUpgrade to actix-web 4.18.2 or later with actix-http 3.20.1 or later.\nAs a workaround, reject compressed request bodies at a reverse proxy or in\nmiddleware before body extraction.",
  "id": "RUSTSEC-2026-0447",
  "modified": "2026-11-06T14:42:53Z",
  "published": "2026-11-06T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/actix-web"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0447.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/actix/actix-web/commit/0d0be61bd757027bfcecbc53df1b7a600f21ecd0"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "Compressed request bodies can exhaust memory before extractor limits apply"
}



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