CVE-2026-42806

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-09-10. A secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.3Exploit: None knownExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

An out-of-bounds read vulnerability was discovered in the Bosch BME690 SensorAPI (C-driver) in version v1.0.3 and prior, specifically within the field data parsing logic in read_all_field_data (bme69x.c). The driver prefetches heater configuration registers into a contiguous 30-byte stack buffer (set_val) mapping IDAC, RES_HEAT, and GAS_WAIT tables. When parsing sensor field data, the gas_index is extracted using a 4-bit mask (0..15) but lacks boundary verification against the valid range (0..9). An attacker or a compromised peripheral mimicking a sensor on the I2C/SPI bus could return a payload with a gas index value of 10 or higher. This causes the driver to perform an out-of-bounds array access (set_val[20 + gas_index]), reading up to 6 bytes past the stack buffer. The leaked out-of-bounds byte is then written into the public gas_wait field, which may lead to measurement corruption or leak adjacent stack memory when telemetered or logged.

CVSS v3
4.3
EG Score
4.3MEDIUMhigh confidence
EG Risk
19
EG Risk 19/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
9th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 10, 2026

Last Modified

September 10, 2026

Advisory Details (1)

Auto-updated Sep 10, 2026
No patch confirmed yet.
generic

BOSCH-SA-223618 | Bosch PSIRT

https://psirt.bosch.com/security-advisories/BOSCH-SA-223618.html

Vendor Advisories for CVE-2026-42806(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 63× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 14:43 UTCGHSA enrichment
  3. 2026-10-03 14:49 UTCEG score recompute
  4. 2026-10-03 14:49 UTCGHSA enrichment
  5. 2026-10-03 14:25 UTCEPSS rescore
  6. 2026-10-02 14:55 UTCEG score recompute
  7. 2026-10-02 14:55 UTCGHSA enrichment
  8. 2026-10-01 19:50 UTCEPSS rescore
  9. 2026-10-01 15:02 UTCGHSA enrichment
  10. 2026-09-30 15:08 UTCEG score recompute
  11. 2026-09-30 15:08 UTCGHSA enrichment
  12. 2026-09-30 15:03 UTCEPSS rescore
  13. 2026-09-29 15:14 UTCEG score recompute
  14. 2026-09-29 15:14 UTCGHSA enrichment
  15. 2026-09-28 15:20 UTCEG score recompute
  16. 2026-09-28 15:20 UTCGHSA enrichment
  17. 2026-09-27 15:26 UTCEG score recompute
  18. 2026-09-27 15:26 UTCGHSA enrichment
  19. 2026-09-27 13:48 UTCEPSS rescore
  20. 2026-09-26 15:58 UTCEPSS rescore
  21. 2026-09-26 15:32 UTCEG score recompute
  22. 2026-09-26 15:32 UTCGHSA enrichment
  23. 2026-09-25 15:37 UTCGHSA enrichment
  24. 2026-09-24 15:41 UTCEG score recompute
  25. 2026-09-24 15:41 UTCGHSA enrichment
Show 38 more
  1. 2026-09-23 17:53 UTCEPSS rescore
  2. 2026-09-23 15:47 UTCGHSA enrichment
  3. 2026-09-22 15:53 UTCEG score recompute
  4. 2026-09-22 15:53 UTCGHSA enrichment
  5. 2026-09-21 15:59 UTCEG score recompute
  6. 2026-09-21 15:59 UTCGHSA enrichment
  7. 2026-09-20 20:15 UTCEPSS rescore
  8. 2026-09-20 16:05 UTCGHSA enrichment
  9. 2026-09-19 16:08 UTCEG score recompute
  10. 2026-09-19 16:08 UTCGHSA enrichment
  11. 2026-09-18 19:28 UTCEPSS rescore
  12. 2026-09-18 16:13 UTCEG score recompute
  13. 2026-09-18 16:13 UTCGHSA enrichment
  14. 2026-09-17 19:31 UTCEPSS rescore
  15. 2026-09-17 15:39 UTCGHSA enrichment
  16. 2026-09-16 15:45 UTCEG score recompute
  17. 2026-09-16 15:45 UTCGHSA enrichment
  18. 2026-09-16 14:08 UTCEPSS rescore
  19. 2026-09-16 05:15 UTCEPSS rescore
  20. 2026-09-15 15:51 UTCEG score recompute
  21. 2026-09-15 15:51 UTCGHSA enrichment
  22. 2026-09-14 15:57 UTCEG score recompute
  23. 2026-09-14 15:57 UTCGHSA enrichment
  24. 2026-09-13 16:47 UTCEPSS rescore
  25. 2026-09-13 16:03 UTCGHSA enrichment
  26. 2026-09-12 16:09 UTCGHSA enrichment
  27. 2026-09-11 16:15 UTCEG score recompute
  28. 2026-09-11 16:15 UTCGHSA enrichment
  29. 2026-09-11 09:37 UTCEPSS rescore
  30. 2026-09-10 16:21 UTCGHSA enrichment
  31. 2026-09-10 15:57 UTCEG score recompute
  32. 2026-09-10 15:57 UTCGHSA enrichment
  33. 2026-09-10 15:22 UTCEG score recompute
  34. 2026-09-10 15:22 UTCGHSA enrichment
  35. 2026-09-10 09:36 UTCEG score recompute
  36. 2026-09-10 09:36 UTCGHSA enrichment
  37. 2026-09-10 09:10 UTCEG score recompute
  38. 2026-09-10 09:09 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-42806?
CVE-2026-42806 is a medium vulnerability published on September 10, 2026. An out-of-bounds read vulnerability was discovered in the Bosch BME690 SensorAPI (C-driver) in version v1.0.3 and prior, specifically within the field data parsing logic in readallfield_data (bme69x.c). The driver prefetches heater configuration registers into a contiguous 30-byte stack buffer…
When was CVE-2026-42806 disclosed?
CVE-2026-42806 was first published on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42806 actively exploited?
CVE-2026-42806 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (9th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-42806?
CVE-2026-42806 has a CVSS base score of 4.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-42806?
No fix for CVE-2026-42806 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-42806 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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