CVE-2026-101050GHSA-pm6h-x3h5-j38h
Heym before 0.0.53 Authentication Bypass via Telegram Webhook
heymrun heym
CVSS
8.3HighExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 28 Sep 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.30%Chance of exploitation activity in the next 30 days, higher than 21% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 0.0.53heymCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
Heym before 0.0.53 fails to verify the X-Telegram-Bot-Api-Secret-Token header on Telegram webhook endpoints when credential_id is absent or secret_token is empty. Remote unauthenticated attackers can post forged Telegram updates to trigger workflows with the owner's configured credentials and execute actions on attacker-supplied input.
Text from CVE List
Affected versions 2
- heymaffected: all versions before 0.0.53CVE List
- heymunaffected: 0.0.53CVE List