CVE-2019-19246

Name: CVE-2019-19246
Creator: NVD / NIST
Published: 2019-11-25T17:15:11.887+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.94%

Last modified Jun 17, 2026

CVE-2019-19246 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Oniguruma through 6.9.3, as used in PHP 7.3.x and other products, has a heap-based buffer over-read in str_lower_case_match in regexec.c.. EPSS estimates a 2.94% chance of exploitation in the next 30 days.

Description

Oniguruma through 6.9.3, as used in PHP 7.3.x and other products, has a heap-based buffer over-read in str_lower_case_match in regexec.c.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.94%

85.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Oniguruma Project	Oniguruma	<= 6.9.3
Php	Php	>= 7.3.0, < 7.3.10
Fedoraproject	Fedora	31
Canonical	Ubuntu Linux	14.04
Debian	Debian Linux	8.0

References

https://bugs.php.net/bug.php?id=78559Third Party Advisory
https://github.com/kkos/oniguruma/commit/d3e402928b6eb3327f8f7d59a9edfa622fec557bPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/12/msg00002.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NO267PLHGYZSWX3XTRPKYBKD4J3YOU5V/
https://usn.ubuntu.com/4460-1/Third Party Advisory
https://bugs.php.net/bug.php?id=78559Third Party Advisory
https://github.com/kkos/oniguruma/commit/d3e402928b6eb3327f8f7d59a9edfa622fec557bPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/12/msg00002.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NO267PLHGYZSWX3XTRPKYBKD4J3YOU5V/
https://usn.ubuntu.com/4460-1/Third Party Advisory

Timeline

Published: Nov 25, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-19246?

Oniguruma through 6.9.3, as used in PHP 7.3.x and other products, has a heap-based buffer over-read in str_lower_case_match in regexec.c.

How severe is CVE-2019-19246?

CVE-2019-19246 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.94% probability of exploitation in the next 30 days.

How do I fix CVE-2019-19246?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-19246?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST