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Excessive memory allocation in net/http and net/textproto

Type: advisorySources: OSV

HTTP and MIME header parsing can allocate large amounts of memory, even when parsing small inputs, potentially leading to a denial of service. Certain unusual patterns of input data can cause the common function used to parse HTTP and MIME headers to allocate substantially more memory than required to hold the parsed headers. An attacker can exploit this behavior to cause an HTTP server to allocate large amounts of memory from a small request, potentially leading to memory exhaustion and a denial of service. With fix, header parsing now correctly allocates only the memory required to hold parsed headers.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2023-24534
Confirmed fixed CVEs
Not specified
Updated in this feed
6 Nov 2026, 00:05 UTC · Revision 1

Source evidence

Excessive memory allocation in net/http and net/textproto

core-osv · Original source

Published 6 Apr 2023, 15:50 UTC

HTTP and MIME header parsing can allocate large amounts of memory, even when parsing small inputs, potentially leading to a denial of service. Certain unusual patterns of input data can cause the common function used to parse HTTP and MIME headers to allocate substantially more memory than required to hold the parsed headers. An attacker can exploit this behavior to cause an HTTP server to allocate large amounts of memory from a small request, potentially leading to memory exhaustion and a denial of service. With fix, header parsing now correctly allocates only the memory required to hold parsed headers.

osv:CVE-2023-24534
Complete source record
{
  "id": "c0023765f893bcda764676b07d0c9e9c8820e0a96ea18935d085a8bb2a22145c",
  "url": "https://osv.dev/vulnerability/CVE-2023-24534",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Excessive memory allocation in net/http and net/textproto",
    "summary": "HTTP and MIME header parsing can allocate large amounts of memory, even when parsing small inputs, potentially leading to a denial of service. Certain unusual patterns of input data can cause the common function used to parse HTTP and MIME headers to allocate substantially more memory than required to hold the parsed headers. An attacker can exploit this behavior to cause an HTTP server to allocate large amounts of memory from a small request, potentially leading to memory exhaustion and a denial of service. With fix, header parsing now correctly allocates only the memory required to hold parsed headers.",
    "evidence": "osv:CVE-2023-24534",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-24534",
      "aliases": [
        "BIT-golang-2023-24534",
        "CVE-2023-24534",
        "GO-2023-1704"
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      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
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      "modified": "2026-10-28T02:30:45.114486009Z",
      "provider": "osv",
      "references": [
        "https://go.dev/cl/481994",
        "https://go.dev/issue/58975",
        "https://groups.google.com/g/golang-announce/c/Xdv6JL9ENs8",
        "https://pkg.go.dev",
        "https://pkg.go.dev/vuln/GO-2023-1704",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/24xxx/CVE-2023-24534.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-24534",
        "https://security.gentoo.org/glsa/202311-09",
        "https://security.netapp.com/advisory/ntap-20230526-0007/"
      ],
      "provider_metadata": {
        "cna_assigner": "Go",
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                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
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        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/24xxx/CVE-2023-24534.json"
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      {
        "value": "CVE-2023-24534",
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 513327,
  "published_at": "2023-04-06T15:50:45.71+00:00"
}