CVE catalog

CVE-2026-87863

curl vulnerabilities

An 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.

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Published: Oct 13, 2026, 10:00:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.27% · Oct 27, 2026

Projects and upstream resources

[curl][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence

Original provider fields

{
  "package_releases": [
    {
      "name": "curl",
      "status": "fixed",
      "release": "sid",
      "version": "8.23.0-1"
    },
    {
      "name": "curl",
      "status": "vulnerable",
      "release": "forky",
      "version": "8.22.0-1"
    },
    {
      "name": "curl",
      "status": "vulnerable",
      "release": "trixie",
      "version": "8.14.1-2+deb13u5"
    },
    {
      "name": "curl",
      "status": "vulnerable",
      "release": "trixie-security",
      "version": "8.14.1-2+deb13u7"
    },
    {
      "name": "curl",
      "status": "not affected",
      "release": "bookworm",
      "version": "7.88.1-10+deb12u15"
    },
    {
      "name": "curl",
      "status": "not affected",
      "release": "bookworm-security",
      "version": "7.88.1-10+deb12u5"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "curl",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "8.23.0~rc1-1"
    },
    {
      "bug": null,
      "name": "curl",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": null,
      "name": "curl",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": null,
      "name": "curl",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "unimportant",
      "fixed_version": "0"
    }
  ],
  "distribution_packages": [
    {
      "name": "curl",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "8.5.0-2ubuntu10.16",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "8.5.0-2ubuntu10.16"
    },
    {
      "name": "libcurl3t64-gnutls",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "8.5.0-2ubuntu10.16",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "8.5.0-2ubuntu10.16"
    },
    {
      "name": "libcurl4-doc",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "8.5.0-2ubuntu10.16",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "8.5.0-2ubuntu10.16"
    },
    {
      "name": "libcurl4-gnutls-dev",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "8.5.0-2ubuntu10.16",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "8.5.0-2ubuntu10.16"
    },
    {
      "name": "libcurl4-openssl-dev",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "8.5.0-2ubuntu10.16",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "8.5.0-2ubuntu10.16"
    },
    {
      "name": "libcurl4t64",
      "distro": "ubuntu",
      "ranges": [
        {
          "fixed": "8.5.0-2ubuntu10.16",
          "introduced": "0"
        }
      ],
      "release": "noble",
      "ecosystem": "deb",
      "fixed_version": "8.5.0-2ubuntu10.16"
    },
    {
      "name": "curl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.5.0-2ubuntu10.16"
            }
          ]
        }
      ],
      "release": "24.04",
      "versions": [
        "8.2.1-1ubuntu3",
        "8.2.1-1ubuntu3.1",
        "8.4.0-2ubuntu1",
        "8.5.0-2ubuntu1",
        "8.5.0-2ubuntu2",
        "8.5.0-2ubuntu8",
        "8.5.0-2ubuntu9",
        "8.5.0-2ubuntu10",
        "8.5.0-2ubuntu10.1",
        "8.5.0-2ubuntu10.2",
        "8.5.0-2ubuntu10.3",
        "8.5.0-2ubuntu10.4",
        "8.5.0-2ubuntu10.5",
        "8.5.0-2ubuntu10.6",
        "8.5.0-2ubuntu10.7",
        "8.5.0-2ubuntu10.8",
        "8.5.0-2ubuntu10.9",
        "8.5.0-2ubuntu10.10",
        "8.5.0-2ubuntu10.11",
        "8.5.0-2ubuntu10.12",
        "8.5.0-2ubuntu10.13",
        "8.5.0-2ubuntu10.15"
      ],
      "ecosystem": "deb",
      "fixed_version": "8.5.0-2ubuntu10.16",
      "provider_record_id": "UBUNTU-CVE-2026-87863"
    },
    {
      "name": "curl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.20.0-2ubuntu11.1"
            }
          ]
        }
      ],
      "release": "26.10",
      "versions": [
        "8.18.0-1ubuntu2",
        "8.20.0-2ubuntu1",
        "8.20.0-2ubuntu3",
        "8.20.0-2ubuntu10",
        "8.20.0-2ubuntu11"
      ],
      "ecosystem": "deb",
      "fixed_version": "8.20.0-2ubuntu11.1",
      "provider_record_id": "UBUNTU-CVE-2026-87863"
    },
    {
      "name": "curl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.18.0-1ubuntu2.8"
            }
          ]
        }
      ],
      "release": "26.04",
      "versions": [
        "8.14.1-2ubuntu1",
        "8.17.0-1ubuntu1",
        "8.18.0-1ubuntu1",
        "8.18.0-1ubuntu2",
        "8.18.0-1ubuntu2.1",
        "8.18.0-1ubuntu2.2",
        "8.18.0-1ubuntu2.3",
        "8.18.0-1ubuntu2.4",
        "8.18.0-1ubuntu2.5",
        "8.18.0-1ubuntu2.7"
      ],
      "ecosystem": "deb",
      "fixed_version": "8.18.0-1ubuntu2.8",
      "provider_record_id": "UBUNTU-CVE-2026-87863"
    },
    {
      "name": "curl",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.23.0-r0"
            }
          ]
        }
      ],
      "release": "3.23",
      "versions": [],
      "ecosystem": "apk",
      "fixed_version": "8.23.0-r0",
      "provider_record_id": "ALPINE-CVE-2026-87863"
    },
    {
      "name": "curl",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.23.0-r0"
            }
          ]
        }
      ],
      "release": "3.24",
      "versions": [],
      "ecosystem": "apk",
      "fixed_version": "8.23.0-r0",
      "provider_record_id": "ALPINE-CVE-2026-87863"
    }
  ]
}

Publisher notes

[trixie] curl: Minor issue

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[curl]Unknown
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
[libcurl3-gnutls]Unknown
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
[libcurl3-nss]Unknown
Source package: [curl]
Details (4)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
[libcurl4]Unknown
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
[libcurl4-doc]Unknown
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · all · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · all · bookworm
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · all · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · all · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · all · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · all · bookworm-security
  Not affected
  usn · curl · debian · bookworm
[libcurl4-gnutls-dev]Unknown
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
[libcurl4-nss-dev]Unknown
Source package: [curl]
Details (4)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
[libcurl4-openssl-dev]Unknown
Source package: [curl]
Details (6)
- 7.88.1-10+deb12u15 · amd64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u15 · arm64 · bookworm
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · amd64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 8.14.1-2+deb13u2~bpo13+1 · arm64 · bookworm-backports
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · amd64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm
- 7.88.1-10+deb12u5 · arm64 · bookworm-security
  Not affected
  usn · curl · debian · bookworm

[Debian 13 (Trixie)]

[curl]Unknown
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Affected
  usn · curl · debian · 13
[libcurl3t64-gnutls]Unknown
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Affected
  usn · curl · debian · 13
[libcurl4-doc]Unknown
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · all · trixie
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u4 · all · trixie
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · all · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · all · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u7 · all · trixie-security
  Affected
  usn · curl · debian · 13
[libcurl4-gnutls]Unknown
Source package: [curl]
Details (2)
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  usn · curl · debian · 13
[libcurl4-gnutls-dev]Unknown
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Affected
  usn · curl · debian · 13
[libcurl4-openssl-dev]Unknown
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Affected
  usn · curl · debian · 13
[libcurl4t64]Unknown
Source package: [curl]
Details (5)
- 8.14.1-2+deb13u4 · amd64 · trixie
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u4 · arm64 · trixie
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · amd64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.21.0-2~bpo13+1 · arm64 · trixie-backports
  Affected
  usn · curl · debian · 13
- 8.14.1-2+deb13u7 · amd64 · trixie-security
  Affected
  usn · curl · debian · 13

Observed: Oct 27, 2026, 4:44:03 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]