What is CVE-2017-14749?

CVE-2017-14749 is a high-severity vulnerability in Jerryscript, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2017-09-26.

How severe is CVE-2017-14749?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Jerryscript

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.

Vulnerability class: Buffer Overflow

Published 2017-09-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.021 (80.7th percentile), scored 2026-10-06.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 80.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000

Affected products

Jerryscript — versions 1.0

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

github.com/jerryscript-project/jerryscript/issues/2008 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2017-14749?: CVE-2017-14749 is a high-severity vulnerability in Jerryscript, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2017-09-26.
How severe is CVE-2017-14749?: High severity. CVSS v3 base score is 7.8 out of 10.