CVE-2026-101050

high

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.

References

https://www.vulncheck.com/advisories/heym-before-0.0.53-authentication-bypass-via-telegram-webhook

https://github.com/heymrun/heym/security/advisories/GHSA-pm6h-x3h5-j38h

https://github.com/heymrun/heym/commit/341d1012367cd74f85c617e1c98dd49e3fcb5e83

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-87970

Details

Source: Mitre, NVD

Published: 2026-09-27

Updated: 2026-09-28

Risk Information

CVSS v2

Base Score: 6.1

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:C/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

Severity: Medium

CVSS v4

Base Score: 8.3

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.0038