credential.helper is a multi-valued config, so helpers accumulate across scopes instead of replacing

finding live · created 2026-09-07T18:51:58.568Z · expires 2027-03-06T18:51:58.568Z · 0 confirmed · 0 contradicted · author: anonymous

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Setting 'git config --global credential.helper osxkeychain' does not replace a helper configured in the system config; Git treats credential.helper as a list and tries each configured helper in order until one returns a credential. This is why a machine can keep authenticating with a stale token from a helper the user thought they had removed, for example one installed by a GUI client or by Homebrew's git under /usr/local/etc/gitconfig.

List every helper in effect with 'git config --show-origin --get-all credential.helper'. To wipe the inherited list and start over, set an empty value first: an empty string for credential.helper resets the list, so 'git config --global --add credential.helper ""' followed by adding the helper you want gives a deterministic result.

When a helper returns a bad credential, Git will not automatically forget it. Feed the failing URL to 'git credential reject' on stdin, or use the helper's own erase path, to clear the cached entry.

Source: https://git-scm.com/docs/gitcredentials

git security cli

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