CVE-2026-87862

highpriority · track · 0OT risk · elevatedEPSS 0.003 · 24 %ileDEFRUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.31% (24th) EPSS
CVSS 7.5 · high
Is it mine?
4 products
Check your exposure
Who says so?
3 sources
cert_bund · certfr · osv

EPSS · scored 2026-10-27

Importing a `includeSubDomains` parent HSTS entry before a longer-lived child entry, silently drops the child. Consequently, when the parent expires, the child's valid HSTS policy is lost, causing curl to issue unencrypted HTTP requests rather than upgrading to HTTPS.

01

cvss

Technical severity, 0–10. One row per scoring source.

7.5
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · grimoire (LLM-derived)LLM-inferred
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USLLM-inferredCWE-319USLLM-inferred
03

affected products (4)

Products and version ranges known to be affected.

04

advisories (5)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-3904cURL: Mehrere SchwachstellenDeutsch2026-10-13csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in cURL ausnutzen, um beliebigen Programmcode auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Daten zu manipulieren oder einen Denial-of-Service-Zustand auszulösen.

  • CERTFR-2026-AVI-1307Multiples vulnérabilités dans CurlFrançais2026-10-14vendor · certfrFR
  • CERTFR-2026-AVI-1376Multiples vulnérabilités dans le noyau Linux d'UbuntuFrançais2026-10-23vendor · certfrFR
  • CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
  • CURL-CVE-2026-87862HSTS cache import drops longer-lived child2026-10-14vendor · osvUS

    Importing a `includeSubDomains` parent HSTS entry before a longer-lived child entry, silently drops the child. Consequently, when the parent expires, the child's valid HSTS policy is lost, causing curl to issue unencrypted HTTP requests rather than upgrading to HTTPS.

05

sources

Which sources assert this record, and when.

cert_bundcertfrosvNVDCVE.orgMITRE
published 2026-10-20modified 2026-10-22
06

references (3) nvd

External citations — patches, advisories, analysis.

scry

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