CVE-2026-8803Network attack vector

Indirect credential disclosure via legacy password hashing

Published May 18, 2026 · Updated May 18, 2026

Weak password hashing in Open Source Point of Sale 3.4.0 through 3.4.2 allows remote attackers to expose employee credentials. The Login function in app/Models/Employee.php verifies legacy password hashes retained for upgrade migration, then replaces them after a successful login. The vendor disputes active exposure because default credentials are migrated on first login and password changes already use the newer hash.

CVSS severity3.7
Low
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak password hashing in Open Source Point of Sale 3.4.0 through 3.4.2 allows remote attackers to expose employee credentials. The Login function in app/Models/Employee.php verifies legacy password hashes retained for upgrade migration, then replaces them after a successful login. The vendor disputes active exposure because default credentials are migrated on first login and password changes already use the newer hash.

The record

CVE
CVE-2026-8803
Published
May 18, 2026
Updated
May 18, 2026
Vendor
opensourcepos
Product
Open Source Point of Sale
Classifications
CWE-328, CWE-327
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 18, 2026CVE publishedPublication date reported by the CVE source.
  2. May 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.4.0
  2. Affected versionversion=3.4.1
  3. Affected versionversion=3.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

opensourcepos · Open Source Point of Saleversion=3.4.0; version=3.4.1; version=3.4.2

Published CVSS scores

3.7VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
6.3VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
2.6VulDBAV:N/AC:H/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-328Use of Weak Hash
CWE-327Use of a Broken or Risky Cryptographic Algorithm

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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