CVE-2023-28320A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, selected at build time.
Updated under an hour ago ()
Does this affect you?
It affects haxx curl and 7 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, selected at build time. If it is built to use the synchronous resolver, it allows name resolves to time-out slow operations using `alarm()` and `siglongjmp()`. When doing this, libcurl used a global buffer that was not mutex protected and a multi-threaded application might therefore crash or otherwise misbehave.
- CVSS
- 5.9 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-400, CWE-362
- 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
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
- 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/1929597exploit, 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
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.