CVE-2026-10536

CVE Enrichment

CVSS: 9.8 CRITICAL
EPSS: 0.60%
EPSS Percentile: 48.52%
CISA KEV: Not listed

Description

A use-after-free vulnerability exists in libcurl when an application configures an HTTP/2 stream-dependency tree via `CURLOPT_STREAM_DEPENDS` or `CURLOPT_STREAM_DEPENDS_E`, subsequently invokes `curl_easy_reset()`, and finally terminates the handle with `curl_easy_cleanup()`. During this final cleanup phase, libcurl attempts to access and modify an internal structure that was already freed during the reset operation.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: 2499f714-1537-4658-8207-48ae4bb9eae9
Published: 03-Jul-2026 14:16
Last Modified: 15-Sep-2026 14:16
EPSS Date: 2026-10-29
CWE: CWE-416

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:N /
                            S:U /
                            C:H /
                            I:H /
                            A:H

Affected Products / Versions

haxx / curl
Version / affected range: * · from (inclusive) 7.88.0 · before (exclusive) 8.21.0
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*

References

Last enrichment sync: 30-Oct-2026 11:58
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

The other identified flaws include credential confusion (CVE-2026-8926), double-free (CVE-2026-8925), use-after-free (CVE-2026-9080 and CVE-2026-10536), and improper host validation (CVE-2026-9547). curl Update Patches 18 Vulnerabilities, Including 25-Year-Old Potential Authentication Bypass

CVE (5)

Vendors (2)

Products (3)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.