CVE-2026-40881

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 81% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-network version 5.0.1, when deserializing addr or addrv2 messages, which contain vectors of addresses, Zebra would fully deserialize them up to a maximum length (over 233,000) that was derived from the 2 MiB message size limit. This is much larger than the actual limit of 1,000 messages from the specification. Zebra would eventually check that limit but, at that point, the memory for the larger vector was already allocated. An attacker could cause out-of-memory aborts in Zebra by sending multiple such messages over different connections. This vulnerability is fixed in zebrad version 4.3.0 and zebra-network version 5.0.1.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
17.7%
KEV
Not listed

Published

April 21, 2026

Last Modified

April 27, 2026

Advisory Details (1)

Auto-updated Jun 7, 2026
Patch available. Sources: github.
github Patch Available

addr/addrv2 Deserialization Resource Exhaustion · Advisory · ZcashFoundation/zebra · GitHub

https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-xr93-pcq3-pxf8

Vendor Advisories for CVE-2026-40881(1)

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

Affected Packages

(2 across 1 ecosystem)
crates.io(2)
PackageVulnerable rangeFixed inDependents
zebrad—4.3.1—
zebra-network—5.0.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 36× 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. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-07 13:46 UTCEPSS rescore
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  15. 2026-06-27 03:08 UTCEPSS rescore
  16. 2026-06-25 13:49 UTCEPSS rescore
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  19. 2026-06-23 21:33 UTCEPSS rescore
  20. 2026-06-22 14:25 UTCEPSS rescore
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  22. 2026-06-21 14:56 UTCEPSS rescore
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  24. 2026-06-21 01:59 UTCEPSS rescore
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  1. 2026-06-18 17:52 UTCEPSS rescore
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  3. 2026-06-17 17:53 UTCEPSS rescore
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  5. 2026-06-15 17:49 UTCEPSS rescore
  6. 2026-06-15 06:08 UTCEG score recompute
  7. 2026-06-14 17:44 UTCEG score recompute
  8. 2026-06-13 23:00 UTCEPSS rescore
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  11. 2026-06-12 05:59 UTCEG score recompute
  12. 2026-06-11 17:43 UTCEG score recompute
  13. 2026-06-11 14:00 UTCEPSS rescore
  14. 2026-06-10 22:18 UTCEPSS rescore
  15. 2026-06-10 17:09 UTCEG score recompute
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  18. 2026-06-10 04:52 UTCEG score recompute
  19. 2026-06-09 16:36 UTCEG score recompute
  20. 2026-06-09 04:20 UTCEG score recompute
  21. 2026-06-08 14:22 UTCEG score recompute
  22. 2026-06-08 14:17 UTCEPSS rescore
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  24. 2026-06-08 02:04 UTCEG score recompute
  25. 2026-06-07 15:25 UTCEPSS rescore
  26. 2026-06-07 15:25 UTCEPSS rescore
  27. 2026-06-07 13:48 UTCEG score recompute
  28. 2026-06-07 01:32 UTCEG score recompute
  29. 2026-06-06 13:47 UTCEPSS rescore
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  31. 2026-06-06 08:22 UTCEG score recompute
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  35. 2026-06-05 06:10 UTCEPSS rescore
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  37. 2026-06-04 14:53 UTCEG score recompute
  38. 2026-06-04 13:12 UTCEPSS rescore
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  40. 2026-06-04 02:13 UTCEG score recompute
  41. 2026-06-03 13:53 UTCEG score recompute
  42. 2026-06-02 20:13 UTCEPSS rescore
  43. 2026-06-02 17:48 UTCEG score recompute
  44. 2026-06-02 05:32 UTCEG score recompute
  45. 2026-06-01 15:54 UTCEG score recompute
  46. 2026-06-01 13:52 UTCEPSS rescore
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  63. 2026-05-26 07:18 UTCEPSS rescore
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  65. 2026-05-23 00:08 UTCEG score recompute
  66. 2026-05-20 22:38 UTCEPSS rescore
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  68. 2026-05-20 16:29 UTCEG score recompute
  69. 2026-05-20 11:22 UTCEPSS rescore
  70. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-40881?
CVE-2026-40881 is a high vulnerability published on April 21, 2026. ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-network version 5.0.1, when deserializing addr or addrv2 messages, which contain vectors of addresses, Zebra would fully deserialize them up to a maximum length (over 233,000) that was derived from the 2 MiB…
When was CVE-2026-40881 disclosed?
CVE-2026-40881 was first published in the National Vulnerability Database on April 21, 2026, with the most recent update on April 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40881 actively exploited?
CVE-2026-40881 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-40881?
CVE-2026-40881 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-40881?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40881, 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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