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Vulnerability record · CVE-2023-27533 · published 30 March 2023

CVE-2023-27533: Haxx curl injection vulnerability

Haxx · Curl

A vulnerability in input validation exists in curl <8.0 during communication using the TELNET protocol may allow an attacker to pass on maliciously crafted user name and "telnet options" during server negotiation. The lack of proper input scrubbing allows an attacker to send content or perform option negotiation without the application's intent. This vulnerability could be exploited if an application allows user input, thereby enabling attackers to execute arbitrary code on the system.

8.8 CVSS 3.1 High EPSS 2.0% · top 20.1% CWE-75 · CWE-75CWE-74 · Injection
8.8CVSS 3.1 base score
2.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
9Affected product versions listed by NVD
10References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A vulnerability in input validation exists in curl <8.0 during communication using the TELNET protocol may allow an attacker to pass on maliciously crafted user name and "telnet options" during server negotiation. The lack of proper input scrubbing allows an attacker to send content or perform option negotiation without the application's intent. This vulnerability could be exploited if an application allows user input, thereby enabling attackers to execute arbitrary code on the system.

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

Affected products

9 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://hackerone.com/reports/1891474 ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERW Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202310-12 Third Party Advisory
https://security.netapp.com/advisory/ntap-20230420-0011/ Third Party Advisory
https://hackerone.com/reports/1891474 ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERW Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202310-12 Third Party Advisory
https://security.netapp.com/advisory/ntap-20230420-0011/ Third Party Advisory

Track CVE-2023-27533 inside VULONE

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Source: NIST National Vulnerability Database (record CVE-2023-27533), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.