GHSA-53Q4-87WJ-266H
Vulnerability from github – Published: 2026-10-20 21:31 – Updated: 2026-10-20 21:31An authenticated HTTPS origin can supply an HSTS max-age value that the
parser accepts, but time serialization later fails to process. On 64-bit
systems, extreme max-age values compute an absolute expiry within standard
time integer limits that exceeds calendar time structure bounds. During cache
saves, the original HSTS file is truncated before writing a temporary
replacement; when serialization fails, the temporary file is deleted, leaving
an empty or partial cache. Because the save error is silently ignored during
cleanup, curl exits successfully despite the data loss.
{
"affected": [],
"aliases": [
"CVE-2026-87863"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-20T21:17:20Z",
"severity": null
},
"details": "An authenticated HTTPS origin can supply an HSTS `max-age` value that the\nparser accepts, but time serialization later fails to process. On 64-bit\nsystems, extreme max-age values compute an absolute expiry within standard\ntime integer limits that exceeds calendar time structure bounds. During cache\nsaves, the original HSTS file is truncated before writing a temporary\nreplacement; when serialization fails, the temporary file is deleted, leaving\nan empty or partial cache. Because the save error is silently ignored during\ncleanup, curl exits successfully despite the data loss.",
"id": "GHSA-53q4-87wj-266h",
"modified": "2026-10-20T21:31:08Z",
"published": "2026-10-20T21:31:08Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-87863"
},
{
"type": "WEB",
"url": "https://hackerone.com/reports/3972373"
},
{
"type": "WEB",
"url": "https://curl.se/docs/CVE-2026-87863.html"
},
{
"type": "WEB",
"url": "https://curl.se/docs/CVE-2026-87863.json"
}
],
"schema_version": "1.4.0",
"severity": []
}
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