How severe is CVE-2018-11591?

CVE-2018-11591 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-11591 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-11591?

CVE-2018-11591 affects Espruino. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-11591?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-11591 published?

CVE-2018-11591 was published on 2018-05-31 and last updated on 2026-06-17.

CVE-2018-11591

CVE-2018-11591 is a medium-severity vulnerability in Espruino with a CVSS 3.x base score of 5.5. 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Espruino
Published: 2018-05-31
Last modified: 2026-06-17

Description

Espruino before 1.98 allows attackers to cause a denial of service (application crash) with a user crafted input file via a NULL pointer dereference during syntax parsing. This was addressed by adding validation for a debug trace print statement in jsvar.c.

Frequently asked questions

What is CVE-2018-11591?: Espruino before 1.98 allows attackers to cause a denial of service (application crash) with a user crafted input file via a NULL pointer dereference during syntax parsing. This was addressed by adding validation for a debug trace print statement in jsvar.c.
How severe is CVE-2018-11591?: CVE-2018-11591 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-11591 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-11591?: CVE-2018-11591 affects Espruino. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-11591?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-11591 published?: CVE-2018-11591 was published on 2018-05-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:espruino:espruino:*:*:*:*:*:*:*:*

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