Improper input validation in curl
Priority MEDIUM 40CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Partial Red Hat: 8 fixed, 9 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.
Summary
curl before version 7.51.0 uses outdated IDNA 2003 standard to handle International Domain Names and this may lead users to potentially and unknowingly issue network transfer requests to the wrong host.
Why it matters now
EPSS 0.04321 91st percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 8 fixed, 9 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| The Curl Project | curl | 7.51.0 | — | No fix listed | CNA |
- curl VendorThe Curl Project Affected 7.51.0 Fixed in — No fix listed CNA
Remediation
Red Hat 2 advisories
- RHSA-2018:3558 Released 2018-11-13 · Red Hat rating Moderatehttpd24 security, bug fix, and enhancement update
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) httpd24-curl-7.61.1-1.el6, httpd24-httpd-2.4.34-7.el6, httpd24-httpd-devel-2.4.34-7.el6 +11
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7, httpd24-httpd-devel-2.4.34-7.el7 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7, httpd24-httpd-devel-2.4.34-7.el7 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7, httpd24-httpd-devel-2.4.34-7.el7 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7, httpd24-httpd-devel-2.4.34-7.el7 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) httpd24-curl-7.61.1-1.el6, httpd24-httpd-2.4.34-7.el6, httpd24-httpd-devel-2.4.34-7.el6 +11
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) httpd24-curl-7.61.1-1.el7, httpd24-httpd-2.4.34-7.el7, httpd24-httpd-devel-2.4.34-7.el7 +12
- RHSA-2018:2486 Released 2018-08-16 · Red Hat rating ImportantRed Hat JBoss Core Services Apache HTTP Server 2.4.29 security update
- Red Hat JBoss Core Services
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| .NET Core 1.0 on Red Hat Enterprise Linux | Affected | No fix yet |
| .NET Core 1.1 on Red Hat Enterprise Linux | Affected | No fix yet |
| .NET Core 2.0 on Red Hat Enterprise Linux | Affected | No fix yet |
| .NET Core 2.1 on Red Hat Enterprise Linux | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Virtualization 3 | Affected | No fix planned: Will not fix |
| Red Hat JBoss Enterprise Web Server 3 | Affected | No fix yet: Fix deferred |
| Red Hat JBoss Core Services | Fixed | RHSA-2018:2486 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2018:3558 |
| Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2018:3558 |
Timeline
- 2026-10-02 Threatist record created from CVE-2016-8625
- 2026-10-03 Alias added: GHSA-33h3-8669-hjwx
References
Patch 3
Other 2
- [bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8
- [bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8
More The Curl Project vulnerabilities
- TI-2019-02834 Stack-based buffer overflow in curl CVSS 3.1CRITICAL 9.8
- TI-2016-07082 Buffer overflow in curl CVSS 3.0CRITICAL 9.8
- TI-2018-12049 Heap-based buffer overflow in curl: CVSS 3.0CRITICAL 9.8
- TI-2016-07084 Heap-based buffer overflow in curl CVSS 3.0CRITICAL 9.8
- TI-2016-07081 The function `read_data()` in security.c in curl before version 7.51.0 is vulnerable to memory double free. CVSS 3.0CRITICAL 9.8
- TI-2016-07080 Use after free in curl CVSS 3.0CRITICAL 9.8
Sources
- CVE-2016-8625 · CVE Program
- CVE-2016-8625 · NVD
- FIRST EPSS
- GHSA-33h3-8669-hjwx · GitHub Advisory Database · CC BY 4.0
- CVE-2016-8625 · 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