Injection in https://github.com/curl/curl
Priority HIGH 82CWE-75Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.02156 82nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 3 advisories
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | https://github.com/curl/curl | Fixed in 8.0.0 | — | No fix listed | CNA |
- https://github.com/curl/curl Vendor— Affected Fixed in 8.0.0 Fixed in — No fix listed CNA
CPE configurations NVD · 14
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* | 7.0.0 – 7.881 | Vulnerable | Haxx |
| cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* | 36 | Vulnerable | Fedoraproject |
| cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:clustered_data_ontap:9.0:-:*:*:*:*:*:* | 9.0 | Vulnerable | NetApp |
| cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
- cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* Versions 7.0.0 – 7.881 Vulnerable ·Haxx
- cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* Versions 36 Vulnerable ·Fedoraproject
- cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:clustered_data_ontap:9.0:-:*:*:*:*:*:* Versions 9.0 Vulnerable ·NetApp
- cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
Show 4 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:* | 8.2.0 to before 8.2.12; 9.0.0 to before 9.0.6 | Vulnerable | Splunk |
| cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:* | 9.1.0 | Vulnerable | Splunk |
- cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:* Versions 8.2.0 to before 8.2.12; 9.0.0 to before 9.0.6 Vulnerable ·Splunk
- cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:* Versions 9.1.0 Vulnerable ·Splunk
Remediation
Red Hat 3 advisories
- RHSA-2023:6679 Released 2023-11-07 · Red Hat rating Moderatecurl security update
- Red Hat Enterprise Linux AppStream (v. 9) libcurl-devel-7.76.1-26.el9
- Red Hat Enterprise Linux BaseOS (v. 9) curl-7.76.1-26.el9, curl-minimal-7.76.1-26.el9, libcurl-7.76.1-26.el9 +1
- RHSA-2023:3354 Released 2023-06-05 · Red Hat rating ImportantRed Hat JBoss Core Services Apache HTTP Server 2.4.51 SP2 security update
- Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apr-util-1.6.1-101.el7jbcs, jbcs-httpd24-apr-util-devel-1.6.1-101.el7jbcs, jbcs-httpd24-apr-util-ldap-1.6.1-101.el7jbcs +23
- Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-apr-util-1.6.1-101.el8jbcs, jbcs-httpd24-apr-util-devel-1.6.1-101.el8jbcs, jbcs-httpd24-apr-util-ldap-1.6.1-101.el8jbcs +23
- RHSA-2023:3355 Released 2023-06-05 · Red Hat rating ImportantRed Hat JBoss Core Services Apache HTTP Server 2.4.51 SP2 security update
- JBCS httpd 2.4.51.sp2
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
https://github.com/curl/curl — FEDORA-2023-7e7414e64d
4 records Highest priority Priority HIGH 2 HIGH, 2 MEDIUM
Other records, highest priority first
- TI-2023-12258 Path traversal in https://github.com/curl/curlPriority HIGH 73
- TI-2023-12260 Authentication bypass in https://github.com/curl/curlPriority MEDIUM 60
- TI-2023-12259 Authentication bypass in https://github.com/curl/curlPriority MEDIUM 60
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| JBCS httpd 2.4.51.sp2 | Fixed | RHSA-2023:3355 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:6679 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2023:6679 |
| Red Hat JBoss Core Services on RHEL 7 Server | Fixed | RHSA-2023:3354 |
| Red Hat JBoss Core Services on RHEL 8 | Fixed | RHSA-2023:3354 |
Not affected: 6 products
- .NET Core 3.1 on Red Hat Enterprise Linux
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat JBoss Core Services on RHEL 7 Server
- Red Hat JBoss Core Services on RHEL 8
Timeline
- 2026-10-02 Threatist record created from CVE-2023-27533
- 2026-10-03 Alias added: GHSA-xvw3-6q4f-2gcv
- 2026-10-09 Fix available: RHSA-2023:3355 · Red Hat
- 2026-10-16 Fix available: JBCS httpd 2.4.51.sp2 · Red Hat
References
Sources
- CVE-2023-27533 · CVE Program
- CVE-2023-27533 · NVD
- FIRST EPSS
- GHSA-xvw3-6q4f-2gcv · GitHub Advisory Database · CC BY 4.0
- CVE-2023-27533 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences