Security readout for executives and security teams
Plain-English summary
Espruino versions before 1.99 could crash when parsing a specially crafted user input file. The public record describes denial of service, not data theft or remote code execution. Exposure depends on whether your environment runs Espruino and lets users or external systems provide files or code for parsing.
Executive priority
Treat this as a targeted availability risk for products or internal tooling that rely on Espruino. Prioritize if the affected parser processes user-supplied files or code in production, customer-facing, or operationally critical environments.
Technical view
The CVE describes a buffer overflow in Espruino's jsvar.c syntax parsing path. A check for '\0' was applied to the wrong array element, which could let crafted input trigger an application crash. The provided sources identify Espruino before 1.99 and reference the related GitHub issue and fix commit.
Likely exposure
Likely limited to systems embedding or running Espruino before 1.99, especially where untrusted input files are parsed. The source bundle does not provide CPEs, deployment scope, CVSS, or detailed platform impact.
Exploitation context
The provided data does not show known active exploitation, and KEV status is false. Public description indicates crafted input can cause a denial-of-service crash during syntax parsing. No exploit maturity, network reachability, or authentication requirements are stated.
Researcher notes
Evidence is sparse: no CVSS, CWE, CPE, exploit status, or detailed attack prerequisites are supplied. Analysis should stay anchored to Espruino before 1.99, jsvar.c syntax parsing, buffer overflow, and denial-of-service impact unless additional vendor evidence is reviewed.
Mitigation direction
- Upgrade Espruino deployments to version 1.99 or later where applicable.
- Confirm the vendor fix commit is included in any forked or embedded builds.
- Restrict untrusted input file parsing until affected builds are upgraded.
- Check Espruino project guidance for build-specific remediation details.
Validation and detection
- Inventory firmware, products, and tooling that embed or run Espruino.
- Verify deployed Espruino versions are not earlier than 1.99.
- Check forked source trees for the referenced jsvar.c fix commit.
- Review crash telemetry for parser crashes around untrusted input handling.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2018-11596 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/espruino/Espruino/issues/1435CVE reference · x_refsource_MISC
- https://github.com/espruino/Espruino/commit/ce1924193862d58cb43d3d4d9dada710a8361b89CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.