Vulnerability-Lookup

GHSA-GCR2-9V8M-GQ45

Vulnerability from github – Published: 2026-09-02 22:44 – Updated: 2026-09-02 22:44

Summary

DiceBear: SVG injection via the unescaped rotate option in @dicebear/core (and fontSize/fontWeight in @dicebear/initials)

Details

Summary

@dicebear/core builds avatar SVGs from caller-supplied options. The numeric rotate option is interpolated into an SVG transform attribute without XML-escaping. It is typed as a number, but nothing checks the type at runtime, so a string value passes straight through and can break out of the attribute to inject arbitrary SVG markup.

This is the same root cause as CVE-2026-33311 (GHSA-mr9r-mww3-v6gv), which escaped the string options backgroundColor, fontFamily, and textColor but did not cover rotate. @dicebear/initials has the same gap in its numeric fontSize and fontWeight options.

Impact

Cross-site scripting (CWE-79). When the generated avatar is rendered inline (for example via innerHTML) or served as image/svg+xml and opened directly, injected markup such as an <image onerror> handler runs script in the page's origin.

Exploitation requires the application to pass untrusted input into one of these options:

rotate (@dicebear/core)
fontSize, fontWeight (@dicebear/initials)

In most integrations these options are set by the developer and only seed is user-controlled, so the vulnerable configuration is uncommon. Applications that use trusted, hardcoded values for these options are not at risk.

Patches

Fixed in @dicebear/core 9.4.3 and @dicebear/initials 9.4.3: the values are now XML-escaped before being written into the SVG, matching the CVE-2026-33311 fix. Upgrade to 9.4.3 or later.

The 5.x through 8.x lines share the same flaw but are end-of-life and will not receive a backport; upgrade to 9.4.3. The 10.x line is not affected.

Workarounds

If you cannot upgrade, coerce the affected options to a number before passing them to createAvatar:

rotate: Number(userInput) || 0,

Credits

Reported by @rz1027.

Severity

4.7 (Medium)


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

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 9.4.2"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@dicebear/core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.4.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 9.4.2"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@dicebear/initials"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.4.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-68921"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-184",
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-02T22:44:25Z",
    "nvd_published_at": "2026-08-20T21:17:07Z",
    "severity": "MODERATE"
  },
  "details": "## Summary\n\n`@dicebear/core` builds avatar SVGs from caller-supplied options. The numeric `rotate` option is interpolated into an SVG `transform` attribute without XML-escaping. It is typed as a number, but nothing checks the type at runtime, so a string value passes straight through and can break out of the attribute to inject arbitrary SVG markup.\n\nThis is the same root cause as CVE-2026-33311 (GHSA-mr9r-mww3-v6gv), which escaped the string options `backgroundColor`, `fontFamily`, and `textColor` but did not cover `rotate`. `@dicebear/initials` has the same gap in its numeric `fontSize` and `fontWeight` options.\n\n## Impact\n\nCross-site scripting (CWE-79). When the generated avatar is rendered inline (for example via `innerHTML`) or served as `image/svg+xml` and opened directly, injected markup such as an `\u003cimage onerror\u003e` handler runs script in the page\u0027s origin.\n\nExploitation requires the application to pass untrusted input into one of these options:\n\n- `rotate` (`@dicebear/core`)\n- `fontSize`, `fontWeight` (`@dicebear/initials`)\n\nIn most integrations these options are set by the developer and only `seed` is user-controlled, so the vulnerable configuration is uncommon. Applications that use trusted, hardcoded values for these options are not at risk.\n\n## Patches\n\nFixed in `@dicebear/core` 9.4.3 and `@dicebear/initials` 9.4.3: the values are now XML-escaped before being written into the SVG, matching the CVE-2026-33311 fix. Upgrade to 9.4.3 or later.\n\nThe 5.x through 8.x lines share the same flaw but are end-of-life and will not receive a backport; upgrade to 9.4.3. The 10.x line is not affected.\n\n## Workarounds\n\nIf you cannot upgrade, coerce the affected options to a number before passing them to `createAvatar`:\n\n```js\nrotate: Number(userInput) || 0,\n```\n\n## Credits\n\nReported by @rz1027.",
  "id": "GHSA-gcr2-9v8m-gq45",
  "modified": "2026-09-02T22:44:26Z",
  "published": "2026-09-02T22:44:25Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/dicebear/dicebear/security/advisories/GHSA-gcr2-9v8m-gq45"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68921"
    },
    {
      "type": "WEB",
      "url": "https://github.com/dicebear/dicebear/commit/922946d738c4e77ab6c412e27ede75941fec4b59"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/dicebear/dicebear"
    },
    {
      "type": "WEB",
      "url": "https://github.com/dicebear/dicebear/releases/tag/v9.4.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "DiceBear: SVG injection via the unescaped rotate option in @dicebear/core (and fontSize/fontWeight in @dicebear/initials)"
}

CVE-2026-68921 (GCVE-0-2026-68921)

Vulnerability from cvelistv5 – Published: 2026-08-20 21:08 – Updated: 2026-08-21 11:32

Title

DiceBear: SVG injection via the unescaped rotate option in @dicebear/core (and fontSize/fontWeight in @dicebear/initials)

Summary

DiceBear is an avatar library for designers and developers. Prior to 9.4.3, @dicebear/core interpolates the rotate option into an SVG transform attribute without XML escaping in addRotate in packages/@dicebear/core/src/utils/svg.ts, while @dicebear/initials similarly emits fontSize and fontWeight without escaping in packages/@dicebear/initials/src/index.ts. Runtime callers can pass strings despite the numeric TypeScript types, break out of the attributes, and inject arbitrary SVG markup. Script can execute in the page origin when the generated avatar is inserted inline or served as image/svg+xml and opened directly, although exploitation requires an application to pass untrusted values into these normally developer-controlled options. This issue is fixed in @dicebear/core and @dicebear/initials version 9.4.3.

Severity

4.7 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 11:32 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-184 - Incomplete List of Disallowed Inputs

Assigner

GitHub_M mitre root Scorecard

References

3 references

URL	Tags
https://github.com/dicebear/dicebear/security/adv…	x_refsource_CONFIRM
https://github.com/dicebear/dicebear/commit/92294…	x_refsource_MISC
https://github.com/dicebear/dicebear/releases/tag…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
dicebear	dicebear	Affected: < 9.4.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-68921",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-21T11:32:11.648752Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-21T11:32:29.303Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "dicebear",
          "vendor": "dicebear",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 9.4.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "DiceBear is an avatar library for designers and developers. Prior to 9.4.3, @dicebear/core interpolates the rotate option into an SVG transform attribute without XML escaping in addRotate in packages/@dicebear/core/src/utils/svg.ts, while @dicebear/initials similarly emits fontSize and fontWeight without escaping in packages/@dicebear/initials/src/index.ts. Runtime callers can pass strings despite the numeric TypeScript types, break out of the attributes, and inject arbitrary SVG markup. Script can execute in the page origin when the generated avatar is inserted inline or served as image/svg+xml and opened directly, although exploitation requires an application to pass untrusted values into these normally developer-controlled options. This issue is fixed in @dicebear/core and @dicebear/initials version 9.4.3."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-184",
              "description": "CWE-184: Incomplete List of Disallowed Inputs",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-20T21:08:43.813Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/dicebear/dicebear/security/advisories/GHSA-gcr2-9v8m-gq45",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/dicebear/dicebear/security/advisories/GHSA-gcr2-9v8m-gq45"
        },
        {
          "name": "https://github.com/dicebear/dicebear/commit/922946d738c4e77ab6c412e27ede75941fec4b59",
          "tags": [
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          "url": "https://github.com/dicebear/dicebear/commit/922946d738c4e77ab6c412e27ede75941fec4b59"
        },
        {
          "name": "https://github.com/dicebear/dicebear/releases/tag/v9.4.3",
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        }
      ],
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        "advisory": "GHSA-gcr2-9v8m-gq45",
        "discovery": "UNKNOWN"
      },
      "title": "DiceBear: SVG injection via the unescaped rotate option in @dicebear/core (and fontSize/fontWeight in @dicebear/initials)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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    "cveId": "CVE-2026-68921",
    "datePublished": "2026-08-20T21:08:43.813Z",
    "dateReserved": "2026-07-31T21:04:04.041Z",
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    "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.

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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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

GHSA-GCR2-9V8M-GQ45

Summary

Impact

Patches

Workarounds

Credits

CVE-2026-68921 (GCVE-0-2026-68921)

Tags

Sightings

Nomenclature

Related by attack behaviour