CVE-2005-4900

Status: ModifiedMedium (5.9)—
SHA-1 is not collision resistant, which makes it easier for context-dependent attackers to conduct spoofing attacks, as demonstrated by attacks on the use of SHA-1 in TLS 1.2. NOTE: this CVE exists to provide a common identifier for referencing this SHA-1 issue; the existence of an identifier is not, by itself, a technology recommendation.
CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Base score: 5.9
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.93%
Percentile among all scored CVEs: 60
Score date: 10/18/2026
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)

Google — Chrome
CWEs

CWE-326
CWE-327
References

Raw JSON (NVD)

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{
  "id": "CVE-2005-4900",
  "cveTags": [],
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  "published": "2016-10-14T16:59:00.187",
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      "url": "https://security.googleblog.com/2015/12/an-update-on-sha-1-certificates-in.html",
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  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-326"
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    {
      "lang": "en",
      "value": "SHA-1 is not collision resistant, which makes it easier for context-dependent attackers to conduct spoofing attacks, as demonstrated by attacks on the use of SHA-1 in TLS 1.2.  NOTE: this CVE exists to provide a common identifier for referencing this SHA-1 issue; the existence of an identifier is not, by itself, a technology recommendation."
    },
    {
      "lang": "es",
      "value": "SHA-1 no es resistente a la colisión, lo que facilita a atacantes dependientes del contexto llevar a cabo ataques de espionaje, como es demostrado por ataques en el uso de SHA-1 en TLS 1.2. NOTA: esta CVE existe para dar un identificador común para referenciar este problema de SHA-1; la existencia de un identificador no es, en si misma, una recomendación tecnológica."
    }
  ],
  "lastModified": "2026-06-16T22:19:40.900",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AFB52550-C3FC-4CDD-AA6E-500BD3304241",
              "versionEndIncluding": "47.0.2526.111"
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          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "evaluatorComment": "SHA-1 is likely present in a large number of products across the entire IT sector. The applicability statement for this CVE will be updated when specific products are identified, as time and resources permit.",
  "sourceIdentifier": "cve@mitre.org"
}