Account Takeover Risk in OpenMage Magento-LTS by OpenMage
CVE-2026-128047

9.2CRITICAL

Key Information:

Vendor

Openmage

Status
Magento-lts
Vendor
CVE Published:
13 November 2026

What is CVE-2026-128047?

OpenMage Magento-LTS versions earlier than 20.18.2 and pre-releases prior to 21.0.0-beta3 utilize inadequate methods for generating customer email-confirmation keys and password-reset tokens. The reliance on md5(uniqid()) and non-cryptographic uniqHash() for creating these keys allows unauthenticated attackers to exploit the unrate-limited confirmAction endpoint, making it possible to brute-force the confirmation keys. This vulnerability creates a significant risk of account takeover, where attackers can log in as pending customers or predict administrator reset tokens by recovering the generator state.

Affected Version(s)

magento-lts 0 < 20.18.2

magento-lts 21.0.0-beta1 < 21.0.0-beta3

magento-lts 20.18.2

References

https://github.com/OpenMage/magento-lts/security/advisori...
vendor-advisory
https://github.com/OpenMage/magento-lts/commit/4a8d91c692...
patch
https://github.com/OpenMage/magento-lts/commit/9f5a1c3cf6...
patch

CVSS V4

Score:
9.2
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

alimony
Abhi-Hackz
hariprasanth9317-tech
philipsorensen
colinmollenhour
.