CVE-2023-28319

Name: CVE-2023-28319
Creator: NVD / NIST
Published: 2023-05-26T21:15:10.02+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.49%

Last modified Jun 17, 2026

CVE-2023-28319 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A use after free vulnerability exists in curl <v8.1.0 in the way libcurl offers a feature to verify an SSH server's public key using a SHA 256 hash. When this check fails, libcurl would free the memory for the fingerprint before it returns an error message containing the (now freed) hash. EPSS estimates a 2.49% chance of exploitation in the next 30 days.

Description

A use after free vulnerability exists in curl <v8.1.0 in the way libcurl offers a feature to verify an SSH server's public key using a SHA 256 hash. When this check fails, libcurl would free the memory for the fingerprint before it returns an error message containing the (now freed) hash. This flaw risks inserting sensitive heap-based data into the error message that might be shown to users or otherwise get leaked and revealed.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.49%

82.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Haxx	Curl	< 8.1.0
Apple	Macos	>= 11.0, < 11.7.9
Apple	Macos	>= 12.0, < 12.6.8
Apple	Macos	>= 13.0, < 13.5
Netapp	Clustered Data Ontap	All versions
Netapp	Ontap Antivirus Connector	All versions
Netapp	H300s Firmware	All versions
Netapp	H500s Firmware	All versions
Netapp	H700s Firmware	All versions
Netapp	H410s Firmware	All versions

References

http://seclists.org/fulldisclosure/2023/Jul/47Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2023/Jul/48Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2023/Jul/52Mailing List, Third Party Advisory
https://hackerone.com/reports/1913733Exploit, Patch, Third Party Advisory
https://security.gentoo.org/glsa/202310-12Third Party Advisory
https://security.netapp.com/advisory/ntap-20230609-0009/Third Party Advisory
https://support.apple.com/kb/HT213843Third Party Advisory
https://support.apple.com/kb/HT213844Third Party Advisory
https://support.apple.com/kb/HT213845Third Party Advisory
http://seclists.org/fulldisclosure/2023/Jul/47Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2023/Jul/48Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2023/Jul/52Mailing List, Third Party Advisory
https://hackerone.com/reports/1913733Exploit, Patch, Third Party Advisory
https://security.gentoo.org/glsa/202310-12Third Party Advisory
https://security.netapp.com/advisory/ntap-20230609-0009/Third Party Advisory
https://support.apple.com/kb/HT213843Third Party Advisory
https://support.apple.com/kb/HT213844Third Party Advisory
https://support.apple.com/kb/HT213845Third Party Advisory

Timeline

Published: May 26, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-28319?

How severe is CVE-2023-28319?

CVE-2023-28319 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.49% probability of exploitation in the next 30 days.

How do I fix CVE-2023-28319?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-28319?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST