Repeated login Keychain prompts and securityd crash after app upgrade on macOS 26.6.x

Privacy & Security General
gilmatok OP
Created 15h
Replies 1
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Overview

We are investigating repeated "login" Keychain prompts affecting our macOS application on macOS 26.6.x.

The issue appears after upgrading an existing installation. A clean uninstall/reinstall of the same version resolves it.

Changing the affected Keychain item's Access Control from "Confirm before allowing access" to explicitly allowing our application/process also stops the prompts.

On one affected machine, Apple Support observed a securityd crash followed by:

SecKeyCreateSignature failed
CSSMERR_DL_INVALID_DB_HANDLE

Our code uses some legacy SecKeychain* APIs, so we are currently investigating whether this is related.

Questions

  • Were there any changes in macOS 26.6.x around securityd, Keychain ACL handling, or legacy SecKeychain* APIs that could explain this?
  • Could an existing Keychain ACL become stale after an application upgrade, even when both versions are signed with the same Developer ID?
Replies  1
Boosts  0
Views  26
Participants  2
Etresoft OP
14h

Were there any changes in macOS 26.6.x around securityd, Keychain ACL handling, or legacy SecKeychain* APIs that could explain this?

Anything involving security should be assumed to be constantly in flux.

Our code uses some legacy SecKeychain* APIs, so we are currently investigating whether this is related.

That sounds logical.

Repeated login Keychain prompts and securityd crash after app upgrade on macOS 26.6.x
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