What Access Failed
The repository rejected the request (403). Your credentials may be valid, but you are not authorized for that repository/path or operation.
This is usually a target-and-identity problem, not a syntax problem. The request made it to the server, but the server did not like the credentials, permissions, or repository path attached to it.
Fix credentials and target access
Check the target and the credential together. Most of these fixes come down to using the right URL, account or token, and scope or repository permissions in the environment that actually failed.
Identify the operation that triggers 403 (download vs deploy) and the exact repository URL.
If this is a deploy error, confirm distributionManagement points to the correct repository (snapshots vs releases) and that your credentials have deploy permission.
If this is a download error, confirm your token/user has read access to the repository and that the path isn't restricted by policy.
If your repository manager enforces IP allowlists or SSO rules, ensure the build environment is allowed and uses the correct auth method.
Retry after permissions/policy are corrected.
Manual authorization checks
Confirm whether the 403 happens on download (dependency resolution) or on deploy (mvn deploy).
Confirm the repository URL is the correct Maven repository endpoint (not a web UI URL).
Check effective settings to confirm which server id Maven will use:mvn -q help:effective-settings
Run with debug logs to capture the exact URL being requested:mvn -X -DskipTests package (or mvn -X deploy).
Why It Happens
Usually this comes down to your account/token lacks permission for the repository (read vs deploy permissions), you are deploying to a repository that is read-only or blocked by policy, snapshot vs release mismatch (for example, deploying a -SNAPSHOT to a releases-only repository), or security controls (IP allowlists, WAF rules) block the request even with valid credentials.
Prove the Failing Environment Can Reach It
Re-run the original Maven command and confirm the repository no longer returns 403, and confirm Maven can download (or deploy) the artifacts that previously failed.
Why Maven gets 403 responses
A 403 response means the server understood the request but refused to fulfill it. Common causes include insufficient permissions, blocked paths, repository policy mismatches (snapshots vs releases), or security controls like IP allowlists.
Examples
[ERROR] Failed to transfer file: https://repo.example.com/repository/maven-releases/... Return code is: 403, ReasonPhrase: Forbidden.
[ERROR] Failed to deploy artifacts: Could not transfer artifact com.example:app:jar:1.0.0 from/to internal (https://repo.example.com/maven): Return code is: 403, ReasonPhrase: Forbidden.Keep Credentials and Targets Aligned
To prevent this, use separate credentials for read vs deploy and scope them to the minimum required permissions, clearly separate snapshot and release repositories and enforce consistent versioning practices, and centralize access through a repository manager so authorization is consistent across environments.
Docs and source code
github.com/apache/maven/blob/maven-3.9.6/maven-core/src/main/java/org/apache/maven/project/DefaultProjectDependenciesResolver.java
HTTP status failures (401/403/407) are surfaced to Maven as a transfer failure message from the underlying resolver/wagon layer (e.getMessage()). - GitHub
String msg = "Could not resolve dependencies for project " + project.getId() + ": " + e.getMessage();
DependencyResolutionException dex = new DependencyResolutionException(msg, e);
dex.setResult(e.getResult());
throw dex;