Security readout for executives and security teams
Plain-English summary
CVE-2018-11594 is an availability issue in Espruino before 1.99. A crafted input file can crash the application during JavaScript syntax parsing. Business urgency depends on whether Espruino parses untrusted or user-supplied input in production devices, services, or tooling.
Executive priority
Treat this as a targeted availability risk, not a confirmed breach indicator. Prioritize remediation if Espruino is used in production devices or services that accept untrusted input. Otherwise, track and update through normal dependency maintenance.
Technical view
The CVE describes a buffer overflow in Espruino's jsparse.c while parsing VOID tokens. The public references include a GitHub issue, an input attachment, and a fixing commit. No CVSS score, CWE, or detailed affected CPE data is provided in the source bundle.
Likely exposure
Exposure is most likely where Espruino versions before 1.99 process untrusted scripts or input files. Systems using Espruino only with controlled, trusted code have lower practical exposure. The source bundle does not identify specific downstream products or device models.
Exploitation context
The public issue includes a crafted input attachment, so proof-of-concept material appears public. The bundle does not cite CISA KEV listing, in-the-wild exploitation, remote exploitability, privilege impact, or code execution impact.
Researcher notes
Key gaps are CVSS, CWE classification, detailed affected CPEs, and exploitability boundaries. The evidence supports application crash via parser buffer overflow, but not active exploitation or broader impact. Review the linked issue and commit for exact patch context.
Mitigation direction
- Upgrade Espruino deployments to 1.99 or later where applicable.
- Check upstream Espruino guidance and the linked fixing commit before production rollout.
- Restrict who can supply scripts or input files to affected parsers.
- Avoid parsing untrusted files on exposed or safety-critical systems until remediated.
Validation and detection
- Inventory Espruino versions used in firmware, build tools, and embedded runtimes.
- Confirm whether any deployment runs Espruino before 1.99.
- Review whether Espruino parses user-supplied or externally sourced input.
- Check crash logs for parser failures around malformed JavaScript input.
- Verify remediation by confirming the upstream fix is present.
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-2018-11594 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/1434CVE reference · x_refsource_MISC
- https://github.com/espruino/Espruino/files/2022588/input.txtCVE reference · x_refsource_MISC
- https://github.com/espruino/Espruino/commit/c36d30529118aa049797db43f111ddad468aad29CVE 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.