Public proof of conceptFix available

CVE-2026-92386

A public proof of concept exists; no exploitation attested.

Published2026-10-20
WeaknessCWE-1284

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

When writing a long cookie name and value to a Netscape cookie jar, a remote HTTP server can make `curl` write a record that exceeds its line-length parsing limit. Consequently, any subsequent `curl` invocation reading from that same cookie jar using `--cookie` silently aborts parsing prematurely upon encountering the too long line, ignoring all subsequent valid cookies in the file.

Timeline

dates in UTC

2026-10-2021:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-30 09:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-92386?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-92386?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

CVE-2026-92386 Red Hat Product Security13 products fixed · 12 known affected
curl: curl: server-set cookie aborts cookie jar load
curl as a component of Red Hat Enterprise Linux 10 · curl.src as a component of Red Hat Enterprise Linux 10 · libcurl as a component of Red Hat Enterprise Linux 10 · +9 more
RHSA-2026:82895 Red Hat Product Security13 products fixed
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Full record on NVD

Fix

Vendor fix Red Hat Product Security CVE-2026-92386 · 13 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
No fix available, says the vendor Red Hat Product Security CVE-2026-92386 · 7 productsFix deferred
No fix available, says the vendor Red Hat Product Security CVE-2026-92386 · 5 productsAffected

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-30
CISA-ADPSSVC decisionpoc2026-10-29
OpenCVESSVC decisionpoc—
CISA-ADPCVSS 3.18.1read 2026-10-30
CISA-ADPweakness (CWE)CWE-1284read 2026-10-30
FIRST EPSSEPSS score0.3 %2026-10-29

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2026-10-20
Last Modified: 2026-10-29
NVD status: Awaiting Analysis

Frequently asked questions

What is CVE-2026-92386?

Is CVE-2026-92386 actively exploited?

A proof-of-concept exploit exists for CVE-2026-92386, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-92386?

CVE-2026-92386 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

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