CVE-2007-3946

Status: ModifiedMedium (6.4)—

mod_auth (http_auth.c) in lighttpd before 1.4.16 allows remote attackers to cause a denial of service (daemon crash) via unspecified vectors involving (1) a memory leak, (2) use of md5-sess without a cnonce, (3) base64 encoded strings, and (4) trailing whitespace in the Auth-Digest header.

CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:P
Base score: 6.4

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 3.42%
Percentile among all scored CVEs: 89
Score date: 10/6/2026

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)

Lighttpd — Lighttpd

CWEs

NVD-CWE-Other

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2007-3946",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 6.4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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  },
  "affected": [
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      "affectedData": [
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          "versions": [
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  ],
  "published": "2007-07-24T00:30:00.000",
  "references": [
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      "url": "http://osvdb.org/38314",
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    {
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    {
      "url": "http://osvdb.org/38316",
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  "weaknesses": [
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      "description": [
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  "descriptions": [
    {
      "lang": "en",
      "value": "mod_auth (http_auth.c) in lighttpd before 1.4.16 allows remote attackers to cause a denial of service (daemon crash) via unspecified vectors involving (1) a memory leak, (2) use of md5-sess without a cnonce, (3) base64 encoded strings, and (4) trailing whitespace in the Auth-Digest header."
    },
    {
      "lang": "es",
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    }
  ],
  "lastModified": "2026-06-16T22:43:06.560",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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}