CVE-2021-32074Network attack vector

Sensitive data exposure via unmasked multiline secrets

Published May 7, 2021 · Updated Aug 3, 2024

Information disclosure in HashiCorp vault-action before 2.2.0 allows remote attackers to obtain secrets from GitHub Actions logs via multiline output. The action fails to register multiline secret values correctly with GitHub Actions masking, allowing emitted log content to retain the secret. Exploitation requires a workflow that imports a multiline Vault secret and produces output containing it; exposed logs can disclose that secret without changing workflow integrity or availability.

CVSS severity7.5
High
EPSS probability1.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in HashiCorp vault-action before 2.2.0 allows remote attackers to obtain secrets from GitHub Actions logs via multiline output. The action fails to register multiline secret values correctly with GitHub Actions masking, allowing emitted log content to retain the secret. Exploitation requires a workflow that imports a multiline Vault secret and produces output containing it; exposed logs can disclose that secret without changing workflow integrity or availability.

The record

CVE
CVE-2021-32074
Published
May 7, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-532, T1552
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 7, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-532Insertion of Sensitive Information into Log File
T1552Unsecured Credentials

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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