How severe is CVE-2019-12798?

CVE-2019-12798 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-12798 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-12798?

CVE-2019-12798 affects Artifex Mujs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-12798?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2019-12798 published?

CVE-2019-12798 was published on 2019-06-13 and last updated on 2026-06-17.

CVE-2019-12798

CVE-2019-12798 is a critical-severity vulnerability in Artifex Mujs with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-185.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-185
Affected product: Artifex Mujs
Published: 2019-06-13
Last modified: 2026-06-17

Description

An issue was discovered in Artifex MuJS 1.0.5. regcompx in regexp.c does not restrict regular expression program size, leading to an overflow of the parsed syntax list size.

Frequently asked questions

What is CVE-2019-12798?: An issue was discovered in Artifex MuJS 1.0.5. regcompx in regexp.c does not restrict regular expression program size, leading to an overflow of the parsed syntax list size.
How severe is CVE-2019-12798?: CVE-2019-12798 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-12798 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-12798?: CVE-2019-12798 affects Artifex Mujs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-12798?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-12798 published?: CVE-2019-12798 was published on 2019-06-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:artifex:mujs:1.0.5:*:*:*:*:*:*:*

More vulnerabilities in Artifex Mujs

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CVE-2016-10141 — Critical (CVSS 9.8): An integer overflow vulnerability was observed in the regemit function in regexp.c in Artifex Software, Inc. MuJS…

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