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CVE-2023-26133

Status: ModifiedCritical (9.8)—

All versions of the package progressbar.js are vulnerable to Prototype Pollution via the function extend() in the file utils.js.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Progressbar.js Project — Progressbar.js

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2023-26133",
  "cveTags": [],
  "metrics": {
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          "id": "CVE-2023-26133",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-01-06T17:03:34.360181Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "report@snyk.io",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.2,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4.2,
        "exploitabilityScore": 3.9
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          "userInteraction": "NONE",
          "attackComplexity": "LOW",
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          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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          "vendor": "n/a",
          "product": "progressbar.js",
          "versions": [
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              "version": "0",
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              "versionType": "semver"
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  "published": "2023-06-12T05:15:09.400",
  "references": [
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      "url": "https://github.com/kimmobrunfeldt/progressbar.js/blob/74536b9eeeaaf51144706d918ed5a0a679631d96/src/utils.js%23L18",
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      "url": "https://github.com/kimmobrunfeldt/progressbar.js/blob/74536b9eeeaaf51144706d918ed5a0a679631d96/src/utils.js%23L18",
      "tags": [
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    {
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      "tags": [
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        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "report@snyk.io",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1321"
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    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
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      "description": [
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          "value": "CWE-1321"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "All versions of the package progressbar.js are vulnerable to Prototype Pollution via the function extend() in the file utils.js.\r\r"
    }
  ],
  "lastModified": "2026-06-17T05:42:45.080",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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  "sourceIdentifier": "report@snyk.io"
}