High 7.5Published May 26, 2023

CVE-2023-28319A 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.

Updated under an hour ago (Oct 27, 2026, 1:30 AM ET)

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It affects haxx curl and 7 other products. Add what you run to find out whether that includes you.

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Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Oct 23, 2026
First seen by InfoSec Signals: Oct 23, 2026

Affected products

Affected products

haxx curl haxx:curl	before 8.1.0	NVD
apple macos apple:macos	from 11.0 before 11.7.9; from 12.0 before 12.6.8; from 13.0 before 13.5	NVD
netapp clustered_data_ontap netapp:clustered_data_ontap	all versions	NVD
netapp ontap_antivirus_connector netapp:ontap_antivirus_connector	all versions	NVD
netapp h300s_firmware netapp:h300s_firmware	all versions	NVD
netapp h500s_firmware netapp:h500s_firmware	all versions	NVD
netapp h700s_firmware netapp:h700s_firmware	all versions	NVD
netapp h410s_firmware netapp:h410s_firmware	all versions	NVD

References

References

http://seclists.org/fulldisclosure/2023/Jul/47	mailing-list, third-party-advisory
http://seclists.org/fulldisclosure/2023/Jul/48	mailing-list, third-party-advisory
http://seclists.org/fulldisclosure/2023/Jul/52	mailing-list, third-party-advisory
https://hackerone.com/reports/1913733	exploit, patch, third-party-advisory
https://security.gentoo.org/glsa/202310-12	third-party-advisory
https://security.netapp.com/advisory/ntap-20230609-0009/	third-party-advisory
https://support.apple.com/kb/HT213843	third-party-advisory
https://support.apple.com/kb/HT213844	third-party-advisory
https://support.apple.com/kb/HT213845	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.