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Findings

CVE-2026-27704

The Dart and Flutter SDKs provide software development kits for the Dart programming language.

Published Feb 25, 2026 · updated Jun 17, 2026 · dart dart software development kit

The Dart and Flutter SDKs provide software development kits for the Dart programming language. In versions of the Dart SDK prior to 3.11.0 and the Flutter SDK prior to version 3.41.0, when the pub client ( and ) extracts a package in the pub cache, a malicious package archive can have files extracted outside the destination directory in the . A fix has been landed in commit 26c6985c742593d081f8b58450f463a584a4203a. By normalizing the file path before writing file, the attacker can no longer traverse up via a symlink. This patch is released in Dart 3.11.0 and Flutter 3.41.0.vAll packages on pub.dev have been vetted for this vulnerability. New packages are no longer allowed to contain symlinks. The pub client itself doesn't upload symlinks, but duplicates the linked entry, and has been doing this for years. Those whose dependencies are all from pub.dev, third-party repositories trusted to not contain malicious code, or git dependencies are not affected by this vulnerability.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 25, 2026 · NIST NVD

    Detected

    The Dart and Flutter SDKs provide software development kits for the Dart programming language. In versions of the Dart SDK prior to 3.11.0 and the Flutter SDK prior to version 3.41.0, when the pub client ( and ) extracts a package in the pub cache, a malicious package archive can have files extracted outside the destination directory in the . A fix has been landed in commit 26c6985c742593d081f8b58

  2. Jun 17, 2026 · NIST NVD

    Updated

    The Dart and Flutter SDKs provide software development kits for the Dart programming language. In versions of the Dart SDK prior to 3.11.0 and the Flutter SDK prior to version 3.41.0, when the pub client ( and ) extracts a package in the pub cache, a malicious package archive can have files extracted outside the destination directory in the . A fix has been landed in commit 26c6985c742593d081f8b58

Affected

  • cpe dart/dart software development kitversion unspecified
  • cpe flutter/flutterversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-27704

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-27704

    The Dart and Flutter SDKs provide software development kits for the Dart programming language. In versions of the Dart SDK prior to 3.11.0 and the Flutter SDK prior to version 3.41.0, when the pub client ( and ) extracts a package in the pub cache, a malici

    nvd.nist.gov

References