CVE-2019-9637

An issue was discovered in PHP before 7.1.27, 7.2.x before 7.2.16, and 7.3.x before 7.3.3. Due to the way rename() across filesystems is implemented, it is possible that file being renamed is briefly available with wrong permissions while the rename is ongoing, thus enabling unauthorized users to access the data.

Published: 2019-03-08 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-9637 is rated Moderate Risk (63/100): CVSS High severity, with high exploitation likelihood (EPSS 7.35%, 94th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. 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-2019-9637

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 2026-06-27 7.15% 7.35% +0.20%
2 2026-06-15 9.87% 7.15% -2.72%
3 2026-03-18 — 9.87% —

Full EPSS history (53 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-9637

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N 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:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N 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:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2019-9637

OS Trackers for CVE-2019-9637

vendor priority summary link
alpine high CVE-2019-9637: 1 source package rows (php7); 1 state rows across 1 repos (edge-community); fixed 1, open 0. https://security.alpinelinux.org/vuln/CVE-2019-9637
redhat medium — https://access.redhat.com/security/cve/CVE-2019-9637
suse low CVE-2019-9637 severity low: SUSE including 948 source package names (apache2-mod_php5-5.2.14-111.46.1, apache2-mod_php5-5.5.14-109.58.1, …), 1913 product×package rows across 49 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (49 product lines)): Fixed 1559, Known Not Affected 354. https://www.suse.com/security/cve/CVE-2019-9637/
ubuntu low CVE-2019-9637 low priority: Ubuntu including 4 source packages (php5, php7.0, php7.2, php7.3), 24 status rows across 6 suites (bionic, cosmic, disco, trusty, upstream, xenial): DNE 15, released 7, needs-triage 2. https://ubuntu.com/security/CVE-2019-9637

Affected software / configurations for CVE-2019-9637

Vendor Product Version Raw CPE
php php < 7.1.27 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php >= 7.2.0, < 7.2.16 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php >= 7.3.0, < 7.3.3 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 18.04 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 18.10 cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
opensuse leap 42.3 cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*
netapp storage_automation_store — cpe:2.3:a:netapp:storage_automation_store:-:*:*:*:*:*:*:*

References for CVE-2019-9637

URL Tags
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00104.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00012.html
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00041.html
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00044.html
https://access.redhat.com/errata/RHSA-2019:2519
https://access.redhat.com/errata/RHSA-2019:3299
https://bugs.php.net/bug.php?id=77630 Issue Tracking Patch Vendor Advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00043.html Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20190502-0007/ Third Party Advisory
https://support.f5.com/csp/article/K53825211 Third Party Advisory
https://usn.ubuntu.com/3922-1/ Third Party Advisory
https://usn.ubuntu.com/3922-2/ Third Party Advisory
https://usn.ubuntu.com/3922-3/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4403 Third Party Advisory
https://www.tenable.com/security/tns-2019-07
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