---
id: CVE-2023-23914
title: >-
  A cleartext transmission of sensitive information vulnerability exists in curl
  <v7.88.0 that could cause HSTS functionality fail when multiple URLs are
  requested serially
summary: >-
  A cleartext transmission of sensitive information vulnerability exists in curl
  <v7.88.0 that could cause HSTS functionality fail when multiple URLs are
  requested serially. Using its HSTS support, curl can be instructed to use
  HTTPS inste…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-319
vendor: haxx
product: curl
affected:
  - 'curl >= 7.77.0, < 7.88.0'
  - active_iq_unified_manager
  - clustered_data_ontap = 9.0
  - h300s_firmware
  - h500s_firmware
  - h700s_firmware
  - h410s_firmware
  - 'universal_forwarder >= 8.2.0, < 8.2.12'
  - 'universal_forwarder >= 9.0.0, < 9.0.6'
  - universal_forwarder = 9.1.0
patched:
  - curl 7.88.0
  - universal_forwarder 9.0.6
published: '2023-02-23'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T23:17:14.050'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-23914'
references:
  - url: 'https://hackerone.com/reports/1813864'
    label: support@hackerone.com
  - url: 'https://security.gentoo.org/glsa/202310-12'
    label: support@hackerone.com
  - url: 'https://security.netapp.com/advisory/ntap-20230309-0006/'
    label: support@hackerone.com
  - url: 'https://hackerone.com/reports/1813864'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.gentoo.org/glsa/202310-12'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20230309-0006/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00858
epssPercentile: 0.57565
ingestedAt: '2026-10-15T00:02:07.126Z'
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2025-03-12T18:51:37.968536Z'
---

## Overview

A cleartext transmission of sensitive information vulnerability exists in curl <v7.88.0 that could cause HSTS functionality fail when multiple URLs are requested serially. Using its HSTS support, curl can be instructed to use HTTPS instead of usingan insecure clear-text HTTP step even when HTTP is provided in the URL. ThisHSTS mechanism would however surprisingly be ignored by subsequent transferswhen done on the same command line because the state would not be properlycarried on.

## Affected

- `curl >= 7.77.0, < 7.88.0`
- `active_iq_unified_manager`
- `clustered_data_ontap = 9.0`
- `h300s_firmware`
- `h500s_firmware`
- `h700s_firmware`
- `h410s_firmware`
- `universal_forwarder >= 8.2.0, < 8.2.12`
- `universal_forwarder >= 9.0.0, < 9.0.6`
- `universal_forwarder = 9.1.0`

## Remediation

Upgrade past the affected range:

- `curl 7.88.0`
- `universal_forwarder 9.0.6`