CVE-2026-73645

MEDIUMPre-NVD 6.66.6—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (42nd percentile of EPSS-scored CVEs). 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, secondary
6.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 6.6Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

OpenZeppelin Confidential Contracts is an experimental library for developing applications on the Zama fhEVM. Prior to 0.3.1, the ERC7984 contract tracked confidential total supply with an euint64 value, and an overflowing internal _mint operation could fail silently. The wrap and onTransferReceived functions in contracts/token/ERC7984/extensions/ERC7984ERC20Wrapper.sol did not handle that failure, so a user could transfer the underlying token without receiving the corresponding confidential wrapped token. With the default rate(), the wrapper fills after approximately 18.4 trillion tokens, and subsequent wrapping requests can cause loss of funds. This issue is fixed in version 0.3.1.

CVSS v3
6.6
EG Score
6.6MEDIUMmedium confidence
EG Risk
45
EG Risk 45/100CISA 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
Severity66% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (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

August 13, 2026

Last Modified

September 18, 2026

Advisory Details (4)

Auto-updated Aug 13, 2026
Patch available. Sources: github_release, github, github_commit, github_pr.
githubMentions a patch (unverified)

ERC7984ERC20Wrapper: once a wrapper is filled, subsequent wrap requests do not revert and result in loss of funds. · Advisory · OpenZeppelin/openzeppelin-confidential-contracts · GitHub

https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/security/advisories/GHSA-hqf9-8xv5-x8xw
github_release Patch Available

Release v0.3.1 (OpenZeppelin/openzeppelin-confidential-contracts)

Patch available: OpenZeppelin/openzeppelin-confidential-contracts v0.3.1

https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/releases/tag/v0.3.1
github_pr Patch Available

Revert when wrapper is full (#268)

Patch available: OpenZeppelin/openzeppelin-confidential-contracts v0.3.1 (PR #271 merged 2025-12-12)

https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/pull/271
github_commit Patch Available

commit c620d4386021 (OpenZeppelin/openzeppelin-confidential-contracts)

Patch available: OpenZeppelin/openzeppelin-confidential-contracts v0.3.1 (contains commit c620d4386021)

https://github.com/OpenZeppelin/openzeppelin-confidential-contracts/commit/c620d4386021dde63ae3ea1507dee8543791134a

Vendor Advisories for CVE-2026-73645(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
@openzeppelin/confidential-contracts—
  • every version up to 0.3.1: fixed in 0.3.1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 43× 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. 2026-10-10 20:00 UTCEPSS rescore
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  6. 2026-10-06 13:19 UTCEG score recompute
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  1. 2026-09-20 21:52 UTCEG score recompute
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  60. 2026-08-17 21:23 UTCEG score recompute
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  63. 2026-08-16 14:56 UTCEPSS rescore
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  66. 2026-08-15 20:12 UTCEG score recompute
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  68. 2026-08-14 19:36 UTCEG score recompute
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  70. 2026-08-13 18:18 UTCEG score recompute
  71. 2026-08-13 18:12 UTCEG score recompute
  72. 2026-08-13 18:11 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73645?
CVE-2026-73645 is a medium vulnerability published on August 13, 2026. OpenZeppelin Confidential Contracts is an experimental library for developing applications on the Zama fhEVM. Prior to 0.3.1, the ERC7984 contract tracked confidential total supply with an euint64 value, and an overflowing internal _mint operation could fail silently. The wrap and…
When was CVE-2026-73645 disclosed?
CVE-2026-73645 was first published on August 13, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73645 actively exploited?
CVE-2026-73645 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73645?
CVE-2026-73645 has a CVSS base score of 6.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73645?
A fix for CVE-2026-73645 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73645 are linked in the Vendor Advisories panel on this page.

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