---
id: "CVE-2026-118990"
kind: "vulnerability"
aliases: ["CVE-2026-118990"]
title: "CallBackery (Perl): config backup leaves world-readable database dump in /tmp"
severity: "medium"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["callbackery", "package", "perl", "self-hosted"]
not_affected_if: ["no-config-backup", "single-user-host", "version-0.62.0-or-later"]
published_at: "2026-10-30T13:18:31+00:00"
first_seen_at: "2026-10-30T13:30:27+00:00"
updated_at: "2026-10-30T13:32:27+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118990", "first_seen_at": "2026-10-30T13:30:27+00:00"}]
---

# CallBackery (Perl): config backup leaves world-readable database dump in /tmp

CallBackery before 0.62.0 writes a dump of its configuration database, including every user's password hash, to a predictable file in /tmp and never deletes it. A local user can read that dump, or plant a symlink so the dump overwrites a file they choose.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed CallBackery version against the Perl module metadata (`perl -MCallBackery -e 'print $CallBackery::VERSION'`), unknown if the sources do not give the exact command
- Look for leftover files named `/tmp/cbdump*` on hosts where CallBackery has run configuration backups

## Fix

- Move to CallBackery `0.62.0` or later

## Timeline

- 2026-10-30T13:30:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118990

## From the sources

CallBackery versions before 0.62.0 for Perl leave a world-readable dump of the configuration database in /tmp when taking a configuration backup.

getConfigBlob() has the sqlite3 shell write the dump to /tmp/cbdump<pid> and never removes it. The file takes the process umask, and a symlink planted at that predictable name is followed.

The dump holds every user's password hash and every value saved by the application's forms. A local user can read these after any backup, and may redirect the dump to a file of their choosing.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_