Vulnerability-Lookup

(CVE-2026-56851)

Vulnerability from cleanstart – Published: 2026-10-10 00:39 – Updated: 2026-10-09 07:34 – Source website

Summary

Nickname profile can panic with an out-of-bounds slice error when transforming crafted input into a short destination buffer

Details

CVE-2026-56851 affects multiple packages. The Nickname profile can panic with an out-of-bounds slice error when transforming crafted input into a short destination buffer. See references for individual vulnerability details.

Severity

7.5 (High)


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

References

URL

Type

	https://github.com/cleanstart-dev/cleanstart-secu…	ADVISORY
	https://osv.dev/vulnerability/CVE-2026-56851	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-56851	WEB

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "argo-cd",
        "purl": "pkg:apk/cleanstart/argo-cd"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.2.12-r*"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "kustomize",
        "purl": "pkg:apk/cleanstart/kustomize"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.7.1-r6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "CVE-2026-56851 affects multiple packages. The Nickname profile can panic with an out-of-bounds slice error when transforming crafted input into a short destination buffer. See references for individual vulnerability details.",
  "id": "CLEANSTART-2026-MR26422",
  "modified": "2026-10-09T07:34:12Z",
  "published": "2026-10-10T00:39:16.306452Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-MR26422.json"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-56851"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56851"
    }
  ],
  "related": [],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Nickname profile can panic with an out-of-bounds slice error when transforming crafted input into a short destination buffer",
  "upstream": [
    "CVE-2026-56851"
  ]
}

CVE-2026-56851 (GCVE-0-2026-56851)

Vulnerability from cvelistv5 – Published: 2026-10-07 17:46 – Updated: 2026-10-08 13:49

Title

Panic parsing crafted input in x/text/secure/precis in golang.org/x/text

Summary

The Nickname profile can panic with an out-of-bounds slice error when transforming crafted input into a short destination buffer.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-08 13:48 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 75 records in the last 180 days details

References

3 references

URL	Tags
https://go.dev/cl/793360
https://go.dev/issue/80112
https://pkg.go.dev/vuln/GO-2026-6629

Impacted products

1 product

Vendor	Product	Version
golang.org/x/text	golang.org/x/text/secure/precis	Affected: 0 , < 0.41.0 (semver)

Credits

Omkhar Arasaratnam (GitHub: omkhar)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-56851",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-08T13:48:57.351617Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-787",
                "description": "CWE-787 Out-of-bounds Write",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-08T13:49:06.348Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/text/secure/precis",
          "product": "golang.org/x/text/secure/precis",
          "programRoutines": [
            {
              "name": "nickAdditionalMapping.Transform"
            },
            {
              "name": "Profile.Append"
            },
            {
              "name": "Profile.AppendCompareKey"
            },
            {
              "name": "Profile.Bytes"
            },
            {
              "name": "Profile.Compare"
            },
            {
              "name": "Profile.CompareKey"
            },
            {
              "name": "Profile.NewTransformer"
            },
            {
              "name": "Profile.String"
            },
            {
              "name": "Transformer.Bytes"
            },
            {
              "name": "Transformer.String"
            },
            {
              "name": "Transformer.Transform"
            }
          ],
          "vendor": "golang.org/x/text",
          "versions": [
            {
              "lessThan": "0.41.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Omkhar Arasaratnam (GitHub: omkhar)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Nickname profile can panic with an out-of-bounds slice error when transforming crafted input into a short destination buffer."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-787: Out-of-bounds Write",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-07T17:46:35.620Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/cl/793360"
        },
        {
          "url": "https://go.dev/issue/80112"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6629"
        }
      ],
      "title": "Panic parsing crafted input in x/text/secure/precis in golang.org/x/text"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-56851",
    "datePublished": "2026-10-07T17:46:35.620Z",
    "dateReserved": "2026-06-23T15:10:49.352Z",
    "dateUpdated": "2026-10-08T13:49:06.348Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

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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.

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