Vulnerability-Lookup

CVE-2026-6936 (GCVE-0-2026-6936)

Vulnerability from cvelistv5 – Published: 2026-05-27 13:10 – Updated: 2026-05-27 15:30

Title

IBM i is Affected by a Denial of Service Vulnerability []

Summary

IBM i 7.6, 7.5, 7.4, and 7.3 s vulnerable to a denial-of-service attack due to uncontrolled recursion in the Integrated Language Environment (ILE) compiler. An authenticated attacker could exploit this vulnerability by compiling specially crafted source code containing a specific combination of statements.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-27 15:30 UTC

CWE

CWE-674 - Uncontrolled Recursion

Assigner

ibm CNA under the mitre root

CNA scorecard B 88/100 over 1280 records in the last 180 days details

References

1 reference

URL	Tags
https://www.ibm.com/support/pages/node/7272908	vendor-advisorypatch

Impacted products

1 product

Vendor	Product	Version	CPE status
IBM	i	Affected: 7.6 , ≤ 11.5.9 (semver) Affected: 7.5 , ≤ 12.1.4 (semver) Affected: 7.4 Affected: 7.3 cpe:2.3:a:ibm:i:7.6:::::::* cpe:2.3:a:ibm:i:7.6.0:::::::* cpe:2.3:a:ibm:i:7.5:::::::* cpe:2.3:a:ibm:i:7.5.0:::::::* cpe:2.3:a:ibm:i:7.4:::::::* cpe:2.3:a:ibm:i:7.4.0:::::::* cpe:2.3:a:ibm:i:7.3:::::::* cpe:2.3:a:ibm:i:7.3.0:::::::*

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                  "value": "\u003cp\u003e\u003c/p\u003e\u003cdiv\u003e\u003ctable\u003e\u003cthead\u003e\u003ctr\u003e\u003ctd\u003e\u003cstrong\u003eIBM i Release\u003c/strong\u003e\u003c/td\u003e\u003ctd\u003e\u003cstrong\u003e5770-999\u003cbr\u003ePTF Number(s)\u003c/strong\u003e\u003c/td\u003e\u003ctd\u003e\u003cstrong\u003ePTF Download Link(s)\u003c/strong\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/thead\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003e7.6\u003c/td\u003e\u003ctd\u003eMJ09365\u003c/td\u003e\u003ctd\u003e\u003ca href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09365\" rel=\"noopener noreferrer nofollow\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=MJ09365\u003c/a\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e7.5\u003c/td\u003e\u003ctd\u003eMJ09335\u003c/td\u003e\u003ctd\u003e\u003ca href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09335\" rel=\"noopener noreferrer nofollow\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=MJ09335\u003c/a\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e7.4\u003c/td\u003e\u003ctd\u003eMJ09334\u003c/td\u003e\u003ctd\u003e\u003ca href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09334\" rel=\"noopener noreferrer nofollow\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=MJ09334\u003c/a\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e7.3\u003c/td\u003e\u003ctd\u003eMJ09332\u003c/td\u003e\u003ctd\u003e\u003ca href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09332\" rel=\"noopener noreferrer nofollow\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=MJ09332\u003c/a\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e\u003c/div\u003e\u003cp\u003eIBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.\u003c/p\u003e"
                }
              ],
              "value": "IBM i Release5770-999\nPTF Number(s)PTF Download Link(s)7.6MJ09365 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09365 7.5MJ09335 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09335 7.4MJ09334 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09334 7.3MJ09332 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09332 \n\n\n\nIBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products."
            }
          ],
          "title": "IBM i is Affected by a Denial of Service Vulnerability []",
          "x_generator": {
            "engine": "ibm-cvegen"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
        "assignerShortName": "ibm",
        "cveId": "CVE-2026-6936",
        "datePublished": "2026-05-27T13:10:46.314Z",
        "dateReserved": "2026-04-23T19:11:07.049Z",
        "dateUpdated": "2026-05-27T15:30:14.915Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-6936

Vulnerability from fkie_nvd - Published: 2026-05-27 14:17 - Updated: 2026-10-14 20:10

Severity

6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	psirt@us.ibm.com	https://www.ibm.com/support/pages/node/7272908	Vendor Advisory

Impacted products

	Vendor	Product	Version
	ibm	i	*
	ibm	i	-

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:ibm:i:7.6:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:i:7.6.0:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:i:7.5:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:i:7.5.0:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:i:7.4:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:i:7.4.0:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:i:7.3:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:i:7.3.0:*:*:*:*:*:*:*"
          ],
          "product": "i",
          "vendor": "IBM",
          "versions": [
            {
              "lessThanOrEqual": "11.5.9",
              "status": "affected",
              "version": "7.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "12.1.4",
              "status": "affected",
              "version": "7.5",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "7.4"
            },
            {
              "status": "affected",
              "version": "7.3"
            }
          ]
        }
      ],
      "source": "psirt@us.ibm.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ibm:i:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "46DEA5F3-B160-471F-8C4C-0E8338EDEDA5",
              "versionEndIncluding": "7.6",
              "versionStartIncluding": "7.3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:ibm:i:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "C684FC45-C9BA-4EF0-BD06-BB289450DD21",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "IBM i 7.6, 7.5, 7.4, and 7.3 s vulnerable to a denial-of-service attack due to uncontrolled recursion in the Integrated Language Environment (ILE) compiler. An authenticated attacker could exploit this vulnerability by compiling specially crafted source code containing a specific combination of statements."
    },
    {
      "lang": "es",
      "value": "IBM i 7.6, 7.5, 7.4 y 7.3 es vulnerable a un ataque de denegaci\u00f3n de servicio debido a una recursi\u00f3n incontrolada en el compilador de Integrated Language Environment (ILE). Un atacante autenticado podr\u00eda explotar esta vulnerabilidad al compilar c\u00f3digo fuente especialmente dise\u00f1ado que contenga una combinaci\u00f3n espec\u00edfica de sentencias."
    }
  ],
  "id": "CVE-2026-6936",
  "lastModified": "2026-10-14T20:10:00.190",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "psirt@us.ibm.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-6936",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-27T15:30:02.482494Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-27T14:17:34.923",
  "references": [
    {
      "source": "psirt@us.ibm.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.ibm.com/support/pages/node/7272908"
    }
  ],
  "sourceIdentifier": "psirt@us.ibm.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-674"
        }
      ],
      "source": "psirt@us.ibm.com",
      "type": "Secondary"
    }
  ]
}

GHSA-R635-G5RF-PCVW

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33

Details

Severity

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-6936"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-674"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:34Z",
    "severity": "MODERATE"
  },
  "details": "IBM i 7.6, 7.5, 7.4, and 7.3 s vulnerable to a denial-of-service attack due to uncontrolled recursion in the Integrated Language Environment (ILE) compiler. An authenticated attacker could exploit this vulnerability by compiling specially crafted source code containing a specific combination of statements.",
  "id": "GHSA-r635-g5rf-pcvw",
  "modified": "2026-05-27T15:33:25Z",
  "published": "2026-05-27T15:33:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6936"
    },
    {
      "type": "WEB",
      "url": "https://www.ibm.com/support/pages/node/7272908"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

WID-SEC-W-2026-1695

Vulnerability from csaf_certbund - Published: 2026-05-27 22:00 - Updated: 2026-05-27 22:00

Summary

IBM i: Schwachstelle ermöglicht Denial of Service

Severity

Mittel

Scope

1 vulnerability in this advisory, including CVE-2026-6936.

CVE-2026-6936

Known affected: 4 products

Open the full advisory

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.

Action not permitted

CVE-2026-6936 (GCVE-0-2026-6936)

FKIE_CVE-2026-6936

GHSA-R635-G5RF-PCVW

WID-SEC-W-2026-1695

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour