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Vulnerability record · CVE-2019-19246 · published 25 November 2019

CVE-2019-19246: Oniguruma project oniguruma out-of-bounds read vulnerability

OOniguruma Project · Oniguruma

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.

7.5 CVSS 3.1 High EPSS 2.9% · top 13.4% CWE-125 · Out-of-bounds read
7.5CVSS 3.1 base score, v2 5.0
2.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

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.

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

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugs.php.net/bug.php?id=78559 Third Party Advisory
https://github.com/kkos/oniguruma/commit/d3e402928b6eb3327f8f7d59a9edfa622fec557b PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/12/msg00002.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NO267PLHGYZSWX3XTRPKYBK
https://usn.ubuntu.com/4460-1/ Third Party Advisory
https://bugs.php.net/bug.php?id=78559 Third Party Advisory
https://github.com/kkos/oniguruma/commit/d3e402928b6eb3327f8f7d59a9edfa622fec557b PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/12/msg00002.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NO267PLHGYZSWX3XTRPKYBK
https://usn.ubuntu.com/4460-1/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-19246), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.