CVE-2021-26923Network attack vector

Unauthenticated tooling-version disclosure via version endpoint

Published Mar 15, 2021 · Updated Aug 3, 2024

Information disclosure in Argo CD before 1.7.12 and 1.8.0 through 1.8.3 allows remote attackers to read deployment details. The /api/version handler returns Argo CD and underlying tool version fields without authenticating the request; patched code suppresses tool versions for unauthenticated callers. No credentials or user interaction are required, and the disclosed software inventory supports target profiling; the Argo CD version remains publicly visible by design.

CVSS severity7.5
High
EPSS probability1.44%
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 Argo CD before 1.7.12 and 1.8.0 through 1.8.3 allows remote attackers to read deployment details. The /api/version handler returns Argo CD and underlying tool version fields without authenticating the request; patched code suppresses tool versions for unauthenticated callers. No credentials or user interaction are required, and the disclosed software inventory supports target profiling; the Argo CD version remains publicly visible by design.

The record

CVE
CVE-2021-26923
Published
Mar 15, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-200, T1592.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 15, 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

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NIST NVDCVSS: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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1592.002Gather Victim Host Information: Software

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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