CVE-2023-30853

What it is

Gradle Build Action allows users to execute a Gradle Build in their GitHub Actions workflow. A vulnerability impacts GitHub workflows using the Gradle Build Action prior to version 2.4.2 that have executed the Gradle Build Tool with the configuration cache enabled, potentially exposing secrets configured for the repository. Secrets configured for GitHub Actions are normally passed to the Gradle Build Tool via environment variables. Due to the way that the Gradle Build Tool records these environment variables, they may be persisted into an entry in the GitHub Actions cache. This data stored in the GitHub Actions cache can be read by a GitHub Actions workflow running in an untrusted context, such as that running for a Pull Request submitted by a developer via a repository fork. This vulnerability was discovered internally through code review, and we have not seen any evidence of it being exploited in the wild. However, in addition to upgrading the Gradle Build Action, affected users should delete any potentially vulnerable cache entries and may choose to rotate any potentially affected secrets. Gradle Build Action v2.4.2 and newer no longer saves this sensitive data for later use, preventing ongoing leakage of secrets via the GitHub Actions Cache. While upgrading to the latest version of the Gradle Build Action will prevent leakage of secrets going forward, additional actions may be required due to current or previous GitHub Actions Cache entries containing this information. Current cache entries will remain vulnerable until they are forcibly deleted or they expire naturally after 7 days of not being used. Potentially vulnerable entries can be easily identified in the GitHub UI by searching for a cache entry with key matching `configuration-cache-*`. The maintainers recommend that users of the Gradle Build Action inspect their list of cache entries and manually delete any that match this pattern. While maintainers have not seen any evidence of this vulnerability being exploited, they recommend cycling any repository secrets if you cannot be certain that these have not been compromised. Compromise could occur if a user runs a GitHub Actions workflow for a pull request attempting to exploit this data. Warning signs to look for in a pull request include: - Making changes to GitHub Actions workflow files in a way that may attempt to read/extract data from the Gradle User Home or `<project-root>/.gradle` directories. - Making changes to Gradle build files or other executable files that may be invoked by a GitHub Actions workflow, in a way that may attempt to read/extract information from these locations. Some workarounds to limit the impact of this vulnerability are available: - If the Gradle project does not opt-in to using the configuration cache, then it is not vulnerable. - If the Gradle project does opt-in to using the configuration-cache by default, then the `--no-configuration-cache` command-line argument can be used to disable this feature in a GitHub Actions workflow. In any case, we recommend that users carefully inspect any pull request before approving the execution of GitHub Actions workflows. It may be prudent to require approval for all PRs from external contributors.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account, but needs a user to act. High risk of data exposure.

Exploit odds

0.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2023-04-28 16:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 05:55 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.3% in the next 30 days (EPSS).
• Severity: 7.6 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2023-04-28 16:15 UTC

Last modified

2026-06-17 05:55 UTC

Exploit probability

0.3% · EPSS, next 30 days

Weakness

CWE-200 · Information exposure

Record status

Modified

Affected

• Gradle Build Action < 2.4.2

Attack profile CVSS 3.1 · 7.6

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

Required

Scope

Changed

Confidentiality

High

Integrity

Low

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2023-30853.md and follow it. Check whether this project is affected by CVE-2023-30853. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

Copy as ticket · More options · Status badge