9.1

CVE-2023-23914: haxx curl

CVSS: 9.1v3.1CriticalModified
AliasesALPINE-CVE-2023-23914UBUNTU-CVE-2023-23914DEBIAN-CVE-2023-23914
Published 23-02-2023Last modified 14-10-2026
Open JSON

Vulnerability summary

CVE-2023-23914 is a critical (CVSS 9.1) vulnerability in haxx curl. EPSS estimates a 0.90% chance of exploitation in the next 30 days, higher than 59% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.90%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 4 · Related 3
OPENSUSE-SU-2024:12735-1RHSA-2023:3354SUSE-SU-2023:0429-1USN-5891-1

Timeline

  1. 23-02-2023
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.90%

Chance of exploitation in the next 30 days

Percentile

59%

Versus all other CVEs

30-day change

+0.04 pp

From 0.86% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.90%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (hackerone.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Netapp6 products
Alpine1 product
  • curl≥ 7.77.0, < 7.79.1-r5 | ≥ 7.77.0, < 7.80.0-r6 | ≥ 7.77.0, < 7.83.1-r6 | ≥ 7.77.0, < 7.87.0-r2 | ≥ 7.77.0, < 7.88.0-r0
Chainguard1 product
  • libcurl4All versions (No fix recorded)
Debian1 product
  • curl< 7.88.1-1
Haxx1 product
  • curl≥ 7.77.0, < 7.88.0
Splunk1 product
Ubuntu1 product
  • curl< 7.81.0-1ubuntu1.8
Wolfi1 product
  • libcurl4All versions (No fix recorded)

8 vendors · 13 products

References

11 links
Show all 11 references