CVE-2026-90472

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-09-12. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: Elevated riskExposed: 0

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

msgpack-java through 0.9.12 contains a stack overflow vulnerability in MessageUnpacker.unpackValue() that recursively deserializes arrays and maps without nesting depth limits. Attackers can craft payloads with deeply nested arrays to exhaust the deserializing thread's stack and trigger StackOverflowError, causing per-request deserialization failures.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
55(Attend)
EG Risk 55/100SSVC: Attend

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
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

September 12, 2026

Last Modified

September 14, 2026

Advisory Details (4)

Auto-updated Sep 12, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

msgpack-java through 0.9.12 Stack Overflow via Nested Arrays | Advisories | VulnCheck

https://www.vulncheck.com/advisories/msgpack-java-through-0.9.12-stack-overflow-via-nested-arrays
generic🟡 PoC Available

[security disclosure] Unbounded Recursion in `unpackValue()` — Recoverable StackOverflow DoS · Issue #1015 · msgpack/msgpack-java · GitHub

https://github.com/msgpack/msgpack-java/issues/1015
generic

msgpack-java/msgpack-core/src/main/java/org/msgpack/core/MessageUnpacker.java at v0.9.12 · msgpack/msgpack-java · GitHub

https://github.com/msgpack/msgpack-java/blob/v0.9.12/msgpack-core/src/main/java/org/msgpack/core/MessageUnpacker.java#L646-L664
generic

GitHub - msgpack/msgpack-java: MessagePack serializer implementation for Java / msgpack.org[Java] · GitHub

https://github.com/msgpack/msgpack-java

Vendor Advisories for CVE-2026-90472(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 24× in last 7d / 27× 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. 2026-09-19 19:56 UTCEG score recompute
  2. 2026-09-19 19:56 UTCGHSA enrichment
  3. 2026-09-18 19:46 UTCEG score recompute
  4. 2026-09-18 19:46 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-17 19:36 UTCEG score recompute
  7. 2026-09-17 19:36 UTCGHSA enrichment
  8. 2026-09-17 19:32 UTCEPSS rescore
  9. 2026-09-16 17:58 UTCEG score recompute
  10. 2026-09-16 17:58 UTCGHSA enrichment
  11. 2026-09-16 14:09 UTCEPSS rescore
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 17:38 UTCEG score recompute
  14. 2026-09-15 17:38 UTCGHSA enrichment
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-14 17:28 UTCEG score recompute
  17. 2026-09-14 17:28 UTCGHSA enrichment
  18. 2026-09-14 16:20 UTCEG score recompute
  19. 2026-09-14 16:20 UTCGHSA enrichment
  20. 2026-09-14 11:44 UTCEG score recompute
  21. 2026-09-14 11:44 UTCGHSA enrichment
  22. 2026-09-13 16:48 UTCEPSS rescore
  23. 2026-09-13 11:34 UTCEG score recompute
  24. 2026-09-13 11:34 UTCGHSA enrichment
  25. 2026-09-12 11:24 UTCEG score recompute
Show 2 more
  1. 2026-09-12 11:14 UTCEG score recompute
  2. 2026-09-12 11:13 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-90472?
CVE-2026-90472 is a medium vulnerability published on September 12, 2026. msgpack-java through 0.9.12 contains a stack overflow vulnerability in MessageUnpacker.unpackValue() that recursively deserializes arrays and maps without nesting depth limits. Attackers can craft payloads with deeply nested arrays to exhaust the deserializing thread's stack and trigger…
When was CVE-2026-90472 disclosed?
CVE-2026-90472 was first published in the National Vulnerability Database on September 12, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90472 actively exploited?
CVE-2026-90472 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 73.3% of all scored CVEs.
What is the CVSS score of CVE-2026-90472?
CVE-2026-90472 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-90472?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-90472, 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

Explore the affected products and dependency analysis for CVE-2026-90472

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