CVE-2021-26905Network attack vector

Authenticated cache disclosure via crafted log requests

Published Feb 8, 2021 · Updated Aug 3, 2024

Information disclosure in 1Password SCIM Bridge 1.0.0 through 1.6.1 allows remote authenticated users to read Redis cache data. The authenticated log-file endpoint fails to validate request input and uses crafted values to return items from the application's Redis cache. Exploitation requires the privileged SCIM Bridge authorization token; exposure is limited to deployment details and, with shared Redis, other applications' cached data, while passwords and TLS private keys are not exposed.

CVSS severity6.5
Medium
EPSS probability1.02%
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 1Password SCIM Bridge 1.0.0 through 1.6.1 allows remote authenticated users to read Redis cache data. The authenticated log-file endpoint fails to validate request input and uses crafted values to return items from the application's Redis cache. Exploitation requires the privileged SCIM Bridge authorization token; exposure is limited to deployment details and, with shared Redis, other applications' cached data, while passwords and TLS private keys are not exposed.

The record

CVE
CVE-2021-26905
Published
Feb 8, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-287, T1213
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 8, 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:P/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1213Data from Information Repositories

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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