CVE-2026-8803: Use of Weak Hash in opensourcepos Open Source Point of Sale
A flaw has been found in opensourcepos Open Source Point of Sale up to 3.4.2. Impacted is the function Login of the file app/Models/Employee.php of the component Employee Login. This manipulation causes use of weak hash. Remote exploitation of the attack is possible. The attack is considered to have high complexity. The exploitability is considered difficult. The actual existence of this vulnerability is currently in question. The vendor explains: "[T]he code is still there to allow the upgrade path to work. The default password is initially seeded with the old hash function, but then migrated to a newer one after login. [T]he hash version check might be cleaned up in the future. Currently it's not actively in use as any password change will use a newer hash function."
AI Analysis
Technical Summary
This vulnerability concerns the use of a weak hash function in the employee login component of opensourcepos Open Source Point of Sale versions 3.4.0 through 3.4.2. The weak hash is used initially for default passwords to maintain upgrade compatibility but is replaced with a stronger hash upon password change or login. The vulnerability allows remote attackers to potentially exploit the weak hash, but the attack complexity is high and exploitability is difficult. The vendor indicates the weak hash code is legacy and not actively used for new passwords, suggesting limited practical risk.
Potential Impact
The vulnerability could allow remote attackers to exploit the weak hash used in the login process, potentially compromising authentication. However, the attack complexity is high and exploitability is difficult. The vendor's explanation that passwords are migrated to a stronger hash after login reduces the practical impact. There are no known exploits in the wild. The CVSS 4.0 score is 6.3 (medium severity), reflecting limited but non-negligible risk.
Mitigation Recommendations
No official patch or remediation level has been provided by the vendor. The vendor notes that the weak hash code remains only for upgrade compatibility and that password changes migrate to a stronger hash. Users should ensure they are using the latest version beyond 3.4.2 if available and encourage password changes to trigger migration to stronger hashes. Monitor vendor advisories for any future cleanup or official fixes. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
CVE-2026-8803: Use of Weak Hash in opensourcepos Open Source Point of Sale
Description
A flaw has been found in opensourcepos Open Source Point of Sale up to 3.4.2. Impacted is the function Login of the file app/Models/Employee.php of the component Employee Login. This manipulation causes use of weak hash. Remote exploitation of the attack is possible. The attack is considered to have high complexity. The exploitability is considered difficult. The actual existence of this vulnerability is currently in question. The vendor explains: "[T]he code is still there to allow the upgrade path to work. The default password is initially seeded with the old hash function, but then migrated to a newer one after login. [T]he hash version check might be cleaned up in the future. Currently it's not actively in use as any password change will use a newer hash function."
CVSS v4.0
Score 6.3medium
Affected software
pkg:github/opensourcepos/opensourceposRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability concerns the use of a weak hash function in the employee login component of opensourcepos Open Source Point of Sale versions 3.4.0 through 3.4.2. The weak hash is used initially for default passwords to maintain upgrade compatibility but is replaced with a stronger hash upon password change or login. The vulnerability allows remote attackers to potentially exploit the weak hash, but the attack complexity is high and exploitability is difficult. The vendor indicates the weak hash code is legacy and not actively used for new passwords, suggesting limited practical risk.
Potential Impact
The vulnerability could allow remote attackers to exploit the weak hash used in the login process, potentially compromising authentication. However, the attack complexity is high and exploitability is difficult. The vendor's explanation that passwords are migrated to a stronger hash after login reduces the practical impact. There are no known exploits in the wild. The CVSS 4.0 score is 6.3 (medium severity), reflecting limited but non-negligible risk.
Mitigation Recommendations
No official patch or remediation level has been provided by the vendor. The vendor notes that the weak hash code remains only for upgrade compatibility and that password changes migrate to a stronger hash. Users should ensure they are using the latest version beyond 3.4.2 if available and encourage password changes to trigger migration to stronger hashes. Monitor vendor advisories for any future cleanup or official fixes. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-18T04:37:54.529Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a0b00d0ec166c07b0ae67da
Added to database: 05/18/2026, 12:06:40 UTC
Last enriched: 05/25/2026, 19:26:23 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 76
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