How severe is CVE-2017-14749?

CVE-2017-14749 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-14749 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-14749?

CVE-2017-14749 affects Jerryscript. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-14749?

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

When was CVE-2017-14749 published?

CVE-2017-14749 was published on 2017-09-26 and last updated on 2026-06-17.

CVE-2017-14749

CVE-2017-14749 is a high-severity vulnerability in Jerryscript with a CVSS 3.x base score of 7.8. 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-119.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Jerryscript
Published: 2017-09-26
Last modified: 2026-06-17

Description

JerryScript 1.0 allows remote attackers to cause a denial of service (jmem_heap_alloc_block_internal heap memory corruption) or possibly execute arbitrary code via a crafted .js file, because unrecognized \ characters cause incorrect 0x00 characters in bytecode.literal data.

Frequently asked questions

What is CVE-2017-14749?: JerryScript 1.0 allows remote attackers to cause a denial of service (jmem_heap_alloc_block_internal heap memory corruption) or possibly execute arbitrary code via a crafted .js file, because unrecognized \ characters cause incorrect 0x00 characters in bytecode.literal data.
How severe is CVE-2017-14749?: CVE-2017-14749 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-14749 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-14749?: CVE-2017-14749 affects Jerryscript. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-14749?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-14749 published?: CVE-2017-14749 was published on 2017-09-26 and last updated on 2026-06-17.

References

https://github.com/jerryscript-project/jerryscript/issues/2008

Affected products (1)

cpe:2.3:a:jerryscript:jerryscript:1.0:*:*:*:*:*:*:*

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