AUGUST 4, 2026
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Case File

CVE-2023-27537

MEDIUM · CVSS 5.9 EPSS 1.86%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2023-03-30 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.9. See the original NVD description below for full technical details.

CVE
CVE-2023-27537
Severity
MEDIUM
CVSS
5.9
EPSS
1.86%

Original NVD Description

A double free vulnerability exists in libcurl <8.0.0 when sharing HSTS data between separate "handles". This sharing was introduced without considerations for do this sharing across separate threads but there was no indication of this fact in the documentation. Due to missing mutexes or thread locks, two threads sharing the same HSTS data could end up doing a double-free or use-after-free.

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