CVE-2019-5481

Double-free vulnerability in the FTP-kerberos code in cURL 7.52.0 to 7.65.3.

Published: 2019-09-16 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-5481 is rated High Risk (76.1/100): CVSS Critical severity, with high exploitation likelihood (EPSS 7.27%, 94th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +4.18% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-5481

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 3.08% 7.27% +4.18%
2 2026-06-10 3.61% 3.08% -0.53%
3 2026-05-07 — 3.61% —

Full EPSS history (62 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-5481

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2019-5481

GitHub Security Advisory for CVE-2019-5481

GHSA-hr98-frg6-wvvr · Severity: critical — Double-free vulnerability in the FTP-kerberos code in cURL 7.52.0 to 7.65.3.

OS Trackers for CVE-2019-5481

vendor priority summary link
alpine — CVE-2019-5481: 2 source package rows (curl, gnurl); 82 state rows across 12 repos (3.10-main, 3.11-main, 3.12-main, 3.17-community, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-community, edge-main); fixed 12, open 70. https://security.alpinelinux.org/vuln/CVE-2019-5481
debian not yet assigned CVE-2019-5481 not yet assigned priority: Debian including 1 source packages (curl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-5481
gentoo normal CVE-2019-5481: 1 GLSA(s) (202003-29), 1 atom(s) (net-misc/curl); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2019-5481
redhat medium — https://access.redhat.com/security/cve/CVE-2019-5481
suse medium CVE-2019-5481 severity moderate: SUSE including 355 source package names (0.1.0:libcurl4-7.60.0-3.23.1, 0.1.75:libcurl4-7.60.0-3.23.1, …), 410 product×package rows across 83 product lines (Container caasp/v4/389-ds, Container caasp/v4/busybox, … (83 product lines)): Fixed 220, Known Affected 157, Known Not Affected 33. https://www.suse.com/security/cve/CVE-2019-5481/
ubuntu medium CVE-2019-5481 medium priority: Ubuntu including 1 source packages (curl), 5 status rows across 5 suites (bionic, disco, trusty, upstream, xenial): not-affected 2, released 2, needs-triage 1. https://ubuntu.com/security/CVE-2019-5481

Affected software / configurations for CVE-2019-5481

Vendor Product Version Raw CPE
haxx curl >= 7.52.0, <= 7.65.3 cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
fedoraproject fedora 29 cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
fedoraproject fedora 30 cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
fedoraproject fedora 31 cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
netapp cloud_backup — cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
netapp steelstore — cpe:2.3:a:netapp:steelstore:-:*:*:*:*:*:*:*
netapp solidfire_baseboard_management_controller_firmware — cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:*
oracle communications_operations_monitor 3.4 cpe:2.3:a:oracle:communications_operations_monitor:3.4:*:*:*:*:*:*:*
oracle communications_operations_monitor 4.0 cpe:2.3:a:oracle:communications_operations_monitor:4.0:*:*:*:*:*:*:*
oracle communications_operations_monitor 4.1 cpe:2.3:a:oracle:communications_operations_monitor:4.1:*:*:*:*:*:*:*
oracle communications_operations_monitor 4.2 cpe:2.3:a:oracle:communications_operations_monitor:4.2:*:*:*:*:*:*:*
oracle communications_operations_monitor 4.3 cpe:2.3:a:oracle:communications_operations_monitor:4.3:*:*:*:*:*:*:*
oracle communications_session_border_controller 8.3 cpe:2.3:a:oracle:communications_session_border_controller:8.3:*:*:*:*:*:*:*
oracle communications_session_border_controller 8.4 cpe:2.3:a:oracle:communications_session_border_controller:8.4:*:*:*:*:*:*:*
oracle enterprise_manager_ops_center 12.3.3 cpe:2.3:a:oracle:enterprise_manager_ops_center:12.3.3:*:*:*:*:*:*:*
oracle enterprise_manager_ops_center 12.4.0 cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0:*:*:*:*:*:*:*
oracle mysql_server >= 5.7.0, <= 5.7.28 cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*
oracle mysql_server >= 8.0.0, <= 8.0.18 cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*
oracle oss_support_tools 20.0 cpe:2.3:a:oracle:oss_support_tools:20.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
opensuse leap 15.0 cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
opensuse leap 15.1 cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

References for CVE-2019-5481

URL Tags
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00048.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00055.html Mailing List Third Party Advisory
https://curl.haxx.se/docs/CVE-2019-5481.html Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6CI4QQ2RSZX4VCFM76SIWGKY6BY7UWIC/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGDVKSLY5JUNJRLYRUA6CXGQ2LM63XC3/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UA7KDM2WPM5CJDDGOEGFV6SSGD2J7RNT/
https://seclists.org/bugtraq/2020/Feb/36 Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202003-29 Third Party Advisory
https://security.netapp.com/advisory/ntap-20191004-0003/ Third Party Advisory
https://www.debian.org/security/2020/dsa-4633 Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2020.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2020.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2020.html Patch Third Party Advisory
cvelogic Threat Intelligence