CVE-2026-74238

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-17. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

TIER IV Nebula through 1.2.0 contains an out-of-bounds read vulnerability in the Vlp32Decoder::unpack() function that allows unauthenticated remote attackers to cause the decoder to read past the end of a received UDP buffer into adjacent heap memory by sending a short UDP datagram. Attackers can send a malformed datagram to the Velodyne UDP sensor port, which lacks sender-address restrictions present in other drivers, causing fabricated points derived from heap memory contents to be silently published into downstream PointCloud2 messages consumed by Autoware nodes.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 20, 2026

Advisory Details (2)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

TIER IV Nebula 1.2.0 Heap Out-of-Bounds Read via VLP32 UDP Decoder | Advisories | VulnCheck

https://www.vulncheck.com/advisories/tier-iv-nebula-heap-out-of-bounds-read-via-vlp32-udp-decoder
generic

Out-of-bounds read in Vlp32Decoder::unpack(): incoming UDP datagram cast to a fixed 1206-byte packet struct with no length check (CVE-2026-74238) · Issue #488 · tier4/nebula · GitHub

https://github.com/tier4/nebula/issues/488

Vendor Advisories for CVE-2026-74238(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 21× in last 7d / 21× 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. 2026-08-21 04:40 UTCEG score recompute
  2. 2026-08-21 04:40 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 16:38 UTCEG score recompute
  5. 2026-08-20 16:38 UTCGHSA enrichment
  6. 2026-08-20 15:46 UTCEG score recompute
  7. 2026-08-20 15:46 UTCGHSA enrichment
  8. 2026-08-20 07:39 UTCGHSA enrichment
  9. 2026-08-19 19:36 UTCEG score recompute
  10. 2026-08-19 19:36 UTCGHSA enrichment
  11. 2026-08-19 17:04 UTCEPSS rescore
  12. 2026-08-19 07:34 UTCGHSA enrichment
  13. 2026-08-18 19:32 UTCEG score recompute
  14. 2026-08-18 19:32 UTCGHSA enrichment
  15. 2026-08-18 13:49 UTCEPSS rescore
  16. 2026-08-18 13:49 UTCEPSS rescore
  17. 2026-08-18 07:29 UTCEG score recompute
  18. 2026-08-18 07:29 UTCGHSA enrichment
  19. 2026-08-17 19:27 UTCEG score recompute
  20. 2026-08-17 18:21 UTCEG score recompute
  21. 2026-08-17 18:19 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-74238?
CVE-2026-74238 is a high vulnerability published on August 17, 2026. TIER IV Nebula through 1.2.0 contains an out-of-bounds read vulnerability in the Vlp32Decoder::unpack() function that allows unauthenticated remote attackers to cause the decoder to read past the end of a received UDP buffer into adjacent heap memory by sending a short UDP datagram. Attackers can…
When was CVE-2026-74238 disclosed?
CVE-2026-74238 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74238 actively exploited?
CVE-2026-74238 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 69.2% of all scored CVEs.
What is the CVSS score of CVE-2026-74238?
CVE-2026-74238 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-74238?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74238, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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