Vulnerability-Lookup

GHSA-WPG4-F3MJ-HXH3

Vulnerability from github – Published: 2026-08-17 12:32 – Updated: 2026-08-17 12:32

Details

OutSystems Service Center is vulnerable to a DOM-based Cross-Site Scripting (XSS) attack that can be exploited by a low-privileged attacker via the upload of a file with a malicious filename containing JavaScript code. The vulnerability exists in all locations where a file can be attached and prepared for upload to the server.

This issue was fixed in OutSystems Service Center version 11.41.2

Severity

4.8 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-40126"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-17T12:18:25Z",
    "severity": "MODERATE"
  },
  "details": "OutSystems Service Center is vulnerable to a DOM-based Cross-Site Scripting (XSS) attack that can be exploited by a low-privileged attacker via the upload of a file with a malicious filename containing JavaScript code. The vulnerability exists in all locations where a file can be attached and prepared for upload to the server.\n\nThis issue was fixed in OutSystems Service Center version 11.41.2",
  "id": "GHSA-wpg4-f3mj-hxh3",
  "modified": "2026-08-17T12:32:27Z",
  "published": "2026-08-17T12:32:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40126"
    },
    {
      "type": "WEB",
      "url": "https://cert.pl/en/posts/2026/08/CVE-2026-40126"
    },
    {
      "type": "WEB",
      "url": "https://success.outsystems.com/support/security/vulnerabilities/vulnerability_rpm_6669"
    },
    {
      "type": "WEB",
      "url": "https://www.outsystems.com/downloads/ScreenDetails?ReleaseId=22953\u0026MajorVersion=11\u0026ComponentName=LifeTime"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/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"
    }
  ]
}

CVE-2026-40126 (GCVE-0-2026-40126)

Vulnerability from cvelistv5 – Published: 2026-08-17 12:03 – Updated: 2026-08-17 14:45

Title

DOM-based Cross-Site Scripting in OutSystems Service Center

Summary

Severity

4.8 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-17 14:45 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Assigner

CERT-PL CNA under the ENISA root

CNA scorecard B 81/100 over 217 records in the last 180 days details

References

3 references

URL	Tags
https://cert.pl/en/posts/2026/08/CVE-2026-40126/	third-party-advisory
https://www.outsystems.com/downloads/ScreenDetail…	product
https://success.outsystems.com/support/security/v…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
OutSystems	Service Center	Affected: 0 , < 11.41.2 (semver) cpe:2.3:a:outsystems:service_center::::::::

Credits

Zbigniew Piotrak (AFINE Team)

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JSON

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  "containers": {
    "adp": [
      {
        "metrics": [
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            "other": {
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                "id": "CVE-2026-40126",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-17T14:45:32.922394Z",
                "version": "2.0.3"
              },
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        "providerMetadata": {
          "dateUpdated": "2026-08-17T14:45:46.006Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    "cna": {
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          "product": "Service Center",
          "vendor": "OutSystems",
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              "status": "affected",
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      "credits": [
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          "type": "finder",
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          "scenarios": [
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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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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