rustsec-2026-0258

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "denial-of-service"
        ],
        "cvss": null,
        "informational": null,
        "source": "https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0258.json"
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "h2",
        "purl": "pkg:cargo/h2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.4.16"
            }
          ],
          "type": "SEMVER"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-q83h-524g-xf6h"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "The h2 crate, used internally by hyper, had a flaw that would accept and queue empty DATA frames without limit.\nIf streams were not actively drained, this could lead to unbounded memory usage, or a panic if the length overflows.\n\nLow severity.\n\nPatched in v0.4.16.",
  "id": "RUSTSEC-2026-0258",
  "modified": "2026-10-12T18:00:10.934581734Z",
  "published": "2026-08-17T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/h2"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0258.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hyperium/h2/pull/935"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "h2 unbounded empty DATA frames"
}