CVE-2023-4680Network attack vector

Ciphertext decryption via attacker-chosen nonces

Published Sep 14, 2023 · Updated Sep 26, 2024

Cryptographic nonce reuse in HashiCorp Vault and Vault Enterprise allows remote authenticated users to decrypt arbitrary ciphertext. The transit encrypt endpoint accepts and honors a caller-supplied nonce for a non-convergent key, enabling known-plaintext encryption with nonce reuse. Exploitation requires a Vault token authorized to encrypt with the targeted transit key plus offline cryptanalysis; affected ranges are 1.6.0 through 1.12.10, 1.13.0 through 1.13.6, and 1.14.0 through 1.14.2.

CVSS severity6.8
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cryptographic nonce reuse in HashiCorp Vault and Vault Enterprise allows remote authenticated users to decrypt arbitrary ciphertext. The transit encrypt endpoint accepts and honors a caller-supplied nonce for a non-convergent key, enabling known-plaintext encryption with nonce reuse. Exploitation requires a Vault token authorized to encrypt with the targeted transit key plus offline cryptanalysis; affected ranges are 1.6.0 through 1.12.10, 1.13.0 through 1.13.6, and 1.14.0 through 1.14.2.

The record

CVE
CVE-2023-4680
Published
Sep 14, 2023
Updated
Sep 26, 2024
Vendor
HashiCorp
Product
Vault
Classifications
CWE-323, T1140
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.12.0 <1.12.11
  2. Affected versionversion=1.13.0 <1.13.7
  3. Affected versionversion=1.14.0 <1.14.3
  4. Affected versionversion=1.6.0 <1.12.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

HashiCorp · Vaultversion=1.12.0 <1.12.11; version=1.13.0 <1.13.7; version=1.14.0 <1.14.3; version=1.6.0 <1.12.0
HashiCorp · Vault Enterpriseversion=1.12.0 <1.12.11; version=1.13.0 <1.13.7; version=1.14.0 <1.14.3; version=1.6.0 <1.12.0

Published CVSS scores

6.8HashiCorp Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-323Reusing a Nonce, Key Pair in Encryption
T1140Deobfuscate/Decode Files or Information

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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