CVE-2021-22568: Dart - Publishing to third-party package repositories may expose pub.dev credentials

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-12-09 · updated 2026-06-17
Weakness: CWE-255

Description

When using the dart pub publish command to publish a package to a third-party package server, the request would be authenticated with an oauth2 access_token that is valid for publishing on pub.dev. Using these obtained credentials, an attacker can impersonate the user on pub.dev. We recommend upgrading past https://github.com/dart-lang/sdk/commit/d787e78d21e12ec1ef712d229940b1172aafcdf8 or beyond version 2.15.0

Affected products

Google LLC Dart SDK: before 2.15.0 — fixed in 2.15.0

How to fix

Upgrade to a fixed version: Google LLC Dart SDK 2.15.0. Check the vendor advisory for mitigations.

References

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