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CVE-2026-16270— ReDoS in Open Mercato

Quick assessment

Affected
Open Mercato Open Mercato
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Open Mercato Open Mercato是Open Mercato组织的一款电子商务平台开发框架。 Open Mercato 0.6.4之前版本存在资源管理错误漏洞，该漏洞源于未验证正则表达式规则，具有权限的攻击者可在字段中添加不安全正则表达式，当提供特定字符串时可能导致拒绝服务攻击。

AI Predicted 5.3 Difficulty: Easy EPSS 0.28% · P20

Possible ATT&CK Techniques 1 AI

T1499.001 · OS Exhaustion Flood

Affected Version Matrix 1

VendorProduct Version RangeStatus
Open Mercato Open Mercato < 0.6.4 affected
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I. Basic Information for CVE-2026-16270

Vulnerability Information
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Vulnerability Title
ReDoS in Open Mercato
Source: CVE Program / CVE List V5
Vulnerability Description
Open Mercato does not validate regex rules. An attacker with privileges to create the regex rule can add an unsafe regex to a field. When someone provide the proper string it can result in a DoS attack. This issue was fixed in version 0.6.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
Open Mercato 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open Mercato Open Mercato是Open Mercato组织的一款电子商务平台开发框架。 Open Mercato 0.6.4之前版本存在资源管理错误漏洞，该漏洞源于未验证正则表达式规则，具有权限的攻击者可在字段中添加不安全正则表达式，当提供特定字符串时可能导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Open Mercato Open Mercato 0 ~ 0.6.4 -

II. Public POCs for CVE-2026-16270

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III. Intelligence Information for CVE-2026-16270

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Patches & Fixes for CVE-2026-16270 (1)

Security Blog Posts for CVE-2026-16270 (1)

Other References for CVE-2026-16270 (1)

IV. Related Vulnerabilities

Same weakness: CWE-1333

V. Comments for CVE-2026-16270

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