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    RUSTSEC-2026-0294 (GHSA-8MQ4-3MWQ-QVG6)

    Vulnerability from osv_rustsec – Published: 2026-09-18 12:00 – Updated: 2026-09-21 09:29 – Source website
    VLAI
    Summary
    Unsoundness in UTF-8 'String' trait
    Details

    The String API in iceoryx2-bb-container exposes its contents as mutable bytes through safe APIs, while String::as_str() converts those bytes into a Rust string slice without validating UTF-8. An application can therefore create an invalid &str and trigger undefined behavior using entirely safe Rust.

    The API methods as_mut_bytes and deref_mut where removed from the String API and their implementations (PolymorphicString, RelocatableString, and StaticString ) without replacement. Link to Pull-Request: https://github.com/eclipse-iceoryx/iceoryx2/pull/1956


    {
      "affected": [
        {
          "database_specific": {
            "categories": [],
            "cvss": null,
            "informational": "unsound"
          },
          "ecosystem_specific": {
            "affected_functions": null,
            "affects": {
              "arch": [],
              "functions": [
                "iceoryx2_bb_container::string::String::as_mut_bytes",
                "iceoryx2_bb_container::string::String::deref_mut",
                "iceoryx2_bb_container::string::polymorphic_string::PolymorphicString::as_mut_bytes",
                "iceoryx2_bb_container::string::polymorphic_string::PolymorphicString::deref_mut",
                "iceoryx2_bb_container::string::relocatable_string::RelocatableString::as_mut_bytes",
                "iceoryx2_bb_container::string::relocatable_string::RelocatableString::deref_mut",
                "iceoryx2_bb_container::string::static_string::StaticString::as_mut_bytes",
                "iceoryx2_bb_container::string::static_string::StaticString::deref_mut"
              ],
              "os": []
            }
          },
          "package": {
            "ecosystem": "crates.io",
            "name": "iceoryx2-bb-container",
            "purl": "pkg:cargo/iceoryx2-bb-container"
          },
          "ranges": [
            {
              "events": [
                {
                  "introduced": "0.0.0-0"
                },
                {
                  "fixed": "0.10.0"
                },
                {
                  "introduced": "0.11.0-0"
                }
              ],
              "type": "SEMVER"
            }
          ],
          "versions": []
        }
      ],
      "aliases": [
        "GHSA-8mq4-3mwq-qvg6"
      ],
      "database_specific": {
        "license": "CC0-1.0"
      },
      "details": "The String API in iceoryx2-bb-container exposes its contents as mutable bytes through safe APIs, while String::as_str() converts those bytes into a Rust string slice without validating UTF-8. \nAn application can therefore create an invalid \u0026str and trigger undefined behavior using entirely safe Rust.\n\nThe API methods `as_mut_bytes` and `deref_mut` where removed from the String API and their implementations (PolymorphicString, RelocatableString, and StaticString ) without replacement.\nLink to Pull-Request: https://github.com/eclipse-iceoryx/iceoryx2/pull/1956",
      "id": "RUSTSEC-2026-0294",
      "modified": "2026-09-21T09:29:57Z",
      "published": "2026-09-18T12:00:00Z",
      "references": [
        {
          "type": "PACKAGE",
          "url": "https://crates.io/crates/iceoryx2-bb-container"
        },
        {
          "type": "ADVISORY",
          "url": "https://rustsec.org/advisories/RUSTSEC-2026-0294.html"
        },
        {
          "type": "WEB",
          "url": "https://github.com/eclipse-iceoryx/iceoryx2/pull/1956"
        }
      ],
      "related": [],
      "severity": [],
      "summary": "Unsoundness in UTF-8 \u0027String\u0027 trait"
    }