Cyber Resilience

CVE-2024-27094

Medium

Published: 21 March 2024

Published
21 March 2024
Modified
04 December 2025
KEV Added
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Patch
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CVSS Score v3.1 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
EPSS Score 0.0056 68.8th percentile
Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-27094 is a medium-severity Out-of-bounds Read (CWE-125) vulnerability in Openzeppelin Contracts. Its CVSS base score is 6.5 (Medium).

Operationally, ranked in the top 31.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

OpenZeppelin Contracts is a library for secure smart contract development. The `Base64.encode` function encodes a `bytes` input by iterating over it in chunks of 3 bytes. When this input is not a multiple of 3, the last iteration may read…

more

parts of the memory that are beyond the input buffer. The vulnerability is fixed in 5.0.2 and 4.9.6.

CWE(s)
CWE-125

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

openzeppelin
contracts
4.5.0 — 4.9.6 · 5.0.0 — 5.0.2
openzeppelin
contracts upgradeable
4.5.0 — 4.9.6 · 5.0.0 — 5.0.2

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References