CVE-2026-16270
ReDoS in Open Mercato
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.
INFO
Published Date :
July 22, 2026, 1:16 p.m.
Last Modified :
July 22, 2026, 1:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-16270
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | MEDIUM | 4bb8329e-dd38-46c1-aafb-9bf32bcb93c6 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Open Mercato to version 0.6.4 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-16270.
| URL | Resource |
|---|---|
| https://cert.pl/posts/2026/07/CVE-2026-16270 | |
| https://github.com/open-mercato/open-mercato/pull/1996 | |
| https://www.openmercato.com/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-16270 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-16270
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-16270 vulnerability anywhere in the article.
-
cert.pl
Vulnerability in Open Mercato software
Vulnerability in Open Mercato software CVE ID CVE-2026-16270 Publication date 22 July 2026 Vendor Open Mercato Product Open Mercato Vulnerable versions All before 0.6.4 Vulnerability type (CWE) Ineffi ... Read more
The following table lists the changes that have been made to the
CVE-2026-16270 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Jul. 22, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/open-mercato/open-mercato', 'vendor': 'Open Mercato', 'product': 'Open Mercato', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.6.4', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-1333 Added Reference https://cert.pl/posts/2026/07/CVE-2026-16270 Added Reference https://github.com/open-mercato/open-mercato/pull/1996 Added Reference https://www.openmercato.com/