NVD / CVE Program· CNA mitre

CVE-2019-19204: An issue was discovered in Oniguruma 6.x before 6.9.4_rc2.

HighCVSS 7.5 · v3.1—Proof of concept Fix available

Noroxi assessment

Priority: Monitor (action score 32/100)

Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
Probability of exploitation in the next 30 days: 6.8% (FIRST EPSS); higher than 94.1% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
Fixed version: apcu-panel (AlmaLinux:8) 5.1.17-1.module_el8.3.0+2009+b272fdef; libzip (AlmaLinux:8) 1.5.2-1.module_el8.5.0+152+112d3b8c, 1.5.2-1.module_el8.3.0+2009+b272fdef, 1.5.2-1.module_el8.4.0+2229+b272fdef; libzip-devel (AlmaLinux:8) 1.5.2-1.module_el8.3.0+2009+b272fdef, 1.5.2-1.module_el8.4.0+2229+b272fdef, 1.5.2-1.module_el8.5.0+152+112d3b8c.

Low priority for now. Upgrade to apcu-panel (AlmaLinux:8) 5.1.17-1.module_el8.3.0+2009+b272fdef; libzip (AlmaLinux:8) 1.5.2-1.module_el8.5.0+152+112d3b8c, 1.5.2-1.module_el8.3.0+2009+b272fdef, 1.5.2-1.module_el8.4.0+2229+b272fdef; libzip-devel (AlmaLinux:8) 1.5.2-1.module_el8.3.0+2009+b272fdef, 1.5.2-1.module_el8.4.0+2229+b272fdef, 1.5.2-1.module_el8.5.0+152+112d3b8c or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

An issue was discovered in Oniguruma 6.x before 6.9.4_rc2. In the function fetch_interval_quantifier (formerly known as fetch_range_quantifier) in regparse.c, PFETCH is called without checking PEND. This leads to a heap-based buffer over-read.

Published: Nov 21, 2019
Updated: Jun 16, 2026
EPSS: 6.8% · 94th percentile
CWE: CWE-125

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Action score

Monitor

Low priority for now.

CVSS: 30 / 40 · 7.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 2 / 30 · 6.8%

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Not in KEV: no record of exploitation in the wild
Proof of concept exists, no weaponized module
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
oniguruma project	oniguruma	cpe:2.3:a:oniguruma_project:oniguruma
debian	debian linux	cpe:2.3:o:debian:debian_linux
fedoraproject	fedora	cpe:2.3:o:fedoraproject:fedora

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

debian debian linux8.0
fedoraproject fedora30
fedoraproject fedora31
oniguruma project oniguruma6.0.0 and later · before 6.9.4
oniguruma project oniguruma6.9.4

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

+96

Same product

oniguruma project: all records

Other highest-scoring records for the same primary product.

CVE-2019-19012An integer overflow in the search_in_range function in regexec.c in Oniguruma 6.x before 6.9.4_rc2 leads to an out-of-bounds read, in which…
42Plan
CVE-2019-13224A use-after-free in onig_new_deluxe() in regext.c in Oniguruma 6.9.2 allows attackers to potentially cause information disclosure, denial…
40Plan
CVE-2019-19203An issue was discovered in Oniguruma 6.x before 6.9.4_rc2.
31Monitor

Published before and after this one in the same product

← EarlierCVE-2019-13225Jul 10, 2019 · A NULL Pointer Dereference in match_at() in regexec.c in Oniguruma 6.9.2 allows attackers to potentially cause denial of service by…
27Monitor
← EarlierCVE-2019-16163Sep 9, 2019 · Oniguruma before 6.9.3 allows Stack Exhaustion in regcomp.c because of recursion in regparse.c.
31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
almalinux:apcu-panel	5.1.17-1.module_el8.3.0+2009+b272fdef · AlmaLinux:8	Package registry (OSV)
almalinux:libzip	1.5.2-1.module_el8.5.0+152+112d3b8c · AlmaLinux:8	Package registry (OSV)
almalinux:libzip-devel	1.5.2-1.module_el8.4.0+2229+b272fdef · AlmaLinux:8	Package registry (OSV)
almalinux:libzip-tools	1.5.2-1.module_el8.5.0+152+112d3b8c · AlmaLinux:8	Package registry (OSV)
almalinux:php	7.3.20-1.module_el8.4.0+2229+b272fdef · AlmaLinux:8	Package registry (OSV)
almalinux:php-bcmath	7.3.20-1.module_el8.4.0+2229+b272fdef · AlmaLinux:8	Package registry (OSV)
almalinux:php-cli	7.3.20-1.module_el8.5.0+152+112d3b8c · AlmaLinux:8	Package registry (OSV)
almalinux:php-common	7.3.20-1.module_el8.3.0+2009+b272fdef · AlmaLinux:8	Package registry (OSV)
almalinux:php-dba	7.3.20-1.module_el8.5.0+152+112d3b8c · AlmaLinux:8	Package registry (OSV)
almalinux:php-dbg	7.3.20-1.module_el8.3.0+2009+b272fdef · AlmaLinux:8	Package registry (OSV)
almalinux:php-devel	7.3.20-1.module_el8.4.0+2229+b272fdef · AlmaLinux:8	Package registry (OSV)
almalinux:php-embedded	7.3.20-1.module_el8.3.0+2009+b272fdef · AlmaLinux:8	Package registry (OSV)
debian:libonig	6.9.4-1 · Debian:12	Package registry (OSV)
opensuse:oniguruma	6.7.0-150000.3.3.1 · openSUSE:Leap Micro 5.2	Package registry (OSV)
red hat:apcu-panel	0:5.1.17-1.module+el8.1.0+3189+a1bff096 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:libzip	0:1.5.2-1.module+el8.1.0+3189+a1bff096 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:libzip-debuginfo	0:1.5.2-1.module+el8.1.0+3189+a1bff096 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:libzip-debugsource	0:1.5.2-1.module+el8.1.0+3189+a1bff096 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:libzip-devel	0:1.5.2-1.module+el8.1.0+3189+a1bff096 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:libzip-tools	0:1.5.2-1.module+el8.1.0+3189+a1bff096 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:libzip-tools-debuginfo	0:1.5.2-1.module+el8.1.0+3189+a1bff096 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:php	0:7.3.20-1.module+el8.2.0+7373+b272fdef · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:php-bcmath	0:7.3.20-1.module+el8.2.0+7373+b272fdef · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:php-bcmath-debuginfo	0:7.3.20-1.module+el8.2.0+7373+b272fdef · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:php-cli	0:7.3.20-1.module+el8.2.0+7373+b272fdef · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:php-cli-debuginfo	0:7.3.20-1.module+el8.2.0+7373+b272fdef · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
rocky linux:libzip	0:1.5.2-1.module+el8.4.0+414+2e7afcdd · Rocky Linux:8	Package registry (OSV)
rocky linux:php	0:7.3.20-1.module+el8.4.0+414+2e7afcdd · Rocky Linux:8	Package registry (OSV)
rocky linux:php-pear	1:1.10.9-1.module+el8.4.0+414+2e7afcdd · Rocky Linux:8	Package registry (OSV)
rocky linux:php-pecl-apcu	0:5.1.17-1.module+el8.4.0+414+2e7afcdd · Rocky Linux:8	Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

Proof-of-concept repository on GitHub ×2

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Proof-of-concept repository on GitHub	stars:3	2019-11-21
Proof-of-concept repository on GitHub	stars:0	2019-12-24

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

First PoCNov 21, 2019-1 d
PublishedNov 21, 2019
TodayNov 13, 2026+2548 d

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

Overread BuffersCAPEC-540likelihood: Low · High

ATT&CK techniques

—

Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:45 PM UTC

For records you follow, these changes also arrive as notifications. →

References

github.com/kkos/oniguruma/releases/tag/v6.9.4_rc2

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records

Ecosystem	Package	Affected range	Fix
AlmaLinux:8	apcu-panel	before 5.1.17-1.module_el8.3.0+2009+b272fdef	5.1.17-1.module_el8.3.0+2009+b272fdef
AlmaLinux:8	libzip	before 1.5.2-1.module_el8.5.0+152+112d3b8c	1.5.2-1.module_el8.5.0+152+112d3b8c
AlmaLinux:8	libzip	before 1.5.2-1.module_el8.3.0+2009+b272fdef	1.5.2-1.module_el8.3.0+2009+b272fdef
AlmaLinux:8	libzip	before 1.5.2-1.module_el8.4.0+2229+b272fdef	1.5.2-1.module_el8.4.0+2229+b272fdef
AlmaLinux:8	libzip-devel	before 1.5.2-1.module_el8.3.0+2009+b272fdef	1.5.2-1.module_el8.3.0+2009+b272fdef
AlmaLinux:8	libzip-devel	before 1.5.2-1.module_el8.4.0+2229+b272fdef	1.5.2-1.module_el8.4.0+2229+b272fdef
AlmaLinux:8	libzip-devel	before 1.5.2-1.module_el8.5.0+152+112d3b8c	1.5.2-1.module_el8.5.0+152+112d3b8c
AlmaLinux:8	libzip-tools	before 1.5.2-1.module_el8.3.0+2009+b272fdef	1.5.2-1.module_el8.3.0+2009+b272fdef
AlmaLinux:8	libzip-tools	before 1.5.2-1.module_el8.4.0+2229+b272fdef	1.5.2-1.module_el8.4.0+2229+b272fdef
AlmaLinux:8	libzip-tools	before 1.5.2-1.module_el8.5.0+152+112d3b8c	1.5.2-1.module_el8.5.0+152+112d3b8c
AlmaLinux:8	oniguruma	before 6.8.2-2.1.el8_9	6.8.2-2.1.el8_9
AlmaLinux:8	oniguruma-devel	before 6.8.2-2.1.el8_9	6.8.2-2.1.el8_9
AlmaLinux:8	php	before 7.3.20-1.module_el8.5.0+152+112d3b8c	7.3.20-1.module_el8.5.0+152+112d3b8c
AlmaLinux:8	php	before 7.3.20-1.module_el8.4.0+2229+b272fdef	7.3.20-1.module_el8.4.0+2229+b272fdef
AlmaLinux:8	php	before 7.3.20-1.module_el8.3.0+2009+b272fdef	7.3.20-1.module_el8.3.0+2009+b272fdef
AlmaLinux:8	php-bcmath	before 7.3.20-1.module_el8.5.0+152+112d3b8c	7.3.20-1.module_el8.5.0+152+112d3b8c
AlmaLinux:8	php-bcmath	before 7.3.20-1.module_el8.4.0+2229+b272fdef	7.3.20-1.module_el8.4.0+2229+b272fdef
AlmaLinux:8	php-bcmath	before 7.3.20-1.module_el8.3.0+2009+b272fdef	7.3.20-1.module_el8.3.0+2009+b272fdef
AlmaLinux:8	php-cli	before 7.3.20-1.module_el8.3.0+2009+b272fdef	7.3.20-1.module_el8.3.0+2009+b272fdef
AlmaLinux:8	php-cli	before 7.3.20-1.module_el8.4.0+2229+b272fdef	7.3.20-1.module_el8.4.0+2229+b272fdef
AlmaLinux:8	php-cli	before 7.3.20-1.module_el8.5.0+152+112d3b8c	7.3.20-1.module_el8.5.0+152+112d3b8c
AlmaLinux:8	php-common	before 7.3.20-1.module_el8.5.0+152+112d3b8c	7.3.20-1.module_el8.5.0+152+112d3b8c
AlmaLinux:8	php-common	before 7.3.20-1.module_el8.3.0+2009+b272fdef	7.3.20-1.module_el8.3.0+2009+b272fdef
AlmaLinux:8	php-common	before 7.3.20-1.module_el8.4.0+2229+b272fdef	7.3.20-1.module_el8.4.0+2229+b272fdef