Vulnerability-Lookup

CVE-2026-16270 (GCVE-0-2026-16270)

Vulnerability from cvelistv5 – Published: 2026-07-22 12:37 – Updated: 2026-07-22 18:55 X_Open Source

Title

ReDoS in Open Mercato

Summary

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.

Severity

6.9 (Medium)


                        
                          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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-1333 - Inefficient regular expression complexity

Assigner

CERT-PL

References

3 references

URL	Tags
https://cert.pl/posts/2026/07/CVE-2026-16270	third-party-advisory
https://www.openmercato.com/	product
https://github.com/open-mercato/open-mercato/pull/1996	patch

Impacted products

1 product

Vendor	Product	Version
Open Mercato	Open Mercato	Affected: 0 , < 0.6.4 (semver)

Date Public

2026-07-22 12:32

Credits

Pawel Scibiorski

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-16270

Vulnerability from fkie_nvd - Published: 2026-07-22 13:16 - Updated: 2026-07-22 20:54

Severity

6.9 (Medium) - 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

Summary

References

	URL	Tags
	cvd@cert.pl	https://cert.pl/posts/2026/07/CVE-2026-16270
	cvd@cert.pl	https://github.com/open-mercato/open-mercato/pull/1996
	cvd@cert.pl	https://www.openmercato.com/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Open Mercato",
          "repo": "https://github.com/open-mercato/open-mercato",
          "vendor": "Open Mercato",
          "versions": [
            {
              "lessThan": "0.6.4",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "cvd@cert.pl"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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.\n\n\nThis issue was fixed in version 0.6.4."
    }
  ],
  "id": "CVE-2026-16270",
  "lastModified": "2026-07-22T20:54:47.023",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.9,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
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          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
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          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
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}

GHSA-GCHV-QQ48-9RJW

Vulnerability from github – Published: 2026-07-22 15:31 – Updated: 2026-07-22 15:31

Details

This issue was fixed in version 0.6.4.

Severity

6.9 (Medium)


                  
                    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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-16270"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1333"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-22T13:16:36Z",
    "severity": "MODERATE"
  },
  "details": "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.\n\n\nThis issue was fixed in version 0.6.4.",
  "id": "GHSA-gchv-qq48-9rjw",
  "modified": "2026-07-22T15:31:20Z",
  "published": "2026-07-22T15:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16270"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-mercato/open-mercato/pull/1996"
    },
    {
      "type": "WEB",
      "url": "https://cert.pl/posts/2026/07/CVE-2026-16270"
    },
    {
      "type": "WEB",
      "url": "https://www.openmercato.com"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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/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",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-16270 (GCVE-0-2026-16270)

FKIE_CVE-2026-16270

GHSA-GCHV-QQ48-9RJW

Tags

Sightings

Nomenclature