CVE-2017-18212

CRITICAL

An issue was discovered in JerryScript 1.0. There is a heap-based buffer over-read in the lit_read_code_unit_from_hex function in lit/lit-char-helpers.c via a RegExp("[\x0"); payload.

Affects 1 product across 1 vendor.

CVSS 3.09.8
EPSS1.8%
Percentile78th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-125: Out-of-Bounds Read

Software reads data past the boundary of an allocated buffer, leaking sensitive information or causing crashes.

Related Attack Patterns (CAPEC)
CAPEC-540 Overread Buffers
via CWE-125

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2018. A critical vulnerability affects Jerryscript systems (CVE-2017-18212). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2018-GLOBAL-117812-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2017-18212?
This vulnerability was disclosed in 2018. A critical vulnerability affects Jerryscript systems (CVE-2017-18212). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2017-18212?
CVE-2017-18212 has CVSS 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 1.8%.
Is CVE-2017-18212 actively exploited?
No confirmed active exploitation of CVE-2017-18212 as of 2026-05-30.
How do I remediate CVE-2017-18212?
Priority: MEDIUM.
What systems are affected by CVE-2017-18212?
CVE-2017-18212 affects Jerryscript Jerryscript.
Vulnerability Details
CVE IDCVE-2017-18212
BSIDBS-2018-GLOBAL-117812-C BreachSpider Global ID
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2018-03-01
Last Modified2024-11-21
ICS Relevance15%
Weakness (CWE)
Out-of-Bounds Read
SourceNVD
Official Description

An issue was discovered in JerryScript 1.0. There is a heap-based buffer over-read in the lit_read_code_unit_from_hex function in lit/lit-char-helpers.c via a RegExp("[\x0"); payload.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: An issue was discovered in JerryScript 1.0. There is a heap-based buffer over-read in the lit_read_code_unit_from_hex function in lit/lit-char-helpers.c via a RegExp("[\x0"); payload. CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Exploitation Likelihood: LOW

Affected Products
VendorProductAffected Versions
Jerryscript Jerryscript 1.0
Remediation

No official vendor advisory link on record. See the CVE record →

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 3150 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hash26493060e51ff85f133c86a2b3cb80f98a4656fe8b002ebe8260656cf48fb13903271126d05644a2d55a4e480bf05acda7e89ef23700ff6159d17732dd92dd7f
Related CVEs affecting Jerryscript
CVE-2020-23302 9.8 There is a heap-use-after-free at ecma-helpers-string.c:772 in ecma_ref_ecma_... CVE-2018-11418 9.8 An issue was discovered in JerryScript 1.0. There is a heap-based buffer over... CVE-2018-11419 9.8 An issue was discovered in JerryScript 1.0. There is a heap-based buffer over... CVE-2019-1010176 9.8 JerryScript commit 4e58ccf68070671e1fff5cd6673f0c1d5b80b166 is affected by: B... CVE-2020-23303 9.8 There is a heap-buffer-overflow at jmem-poolman.c:165 in jmem_pools_collect_e...
View all Jerryscript CVEs →

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