CVE-2026-21484Public exploitNetwork attack vector

Username enumeration via inconsistent recovery error punctuation

Published Jan 3, 2026 · Updated Jan 3, 2026

Observable response discrepancy in AnythingLLM allows remote attackers to enumerate usernames through password recovery requests. The recoverAccount function returns “Invalid recovery codes” for some existing-user failures but adds a period when the username does not exist. No authentication or user interaction is required; disclosure is limited to whether a submitted username exists and supports targeted follow-on attacks.

CVSS severity5.3
Medium
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Observable response discrepancy in AnythingLLM allows remote attackers to enumerate usernames through password recovery requests. The recoverAccount function returns “Invalid recovery codes” for some existing-user failures but adds a period when the username does not exist. No authentication or user interaction is required; disclosure is limited to whether a submitted username exists and supports targeted follow-on attacks.

The record

CVE
CVE-2026-21484
Published
Jan 3, 2026
Updated
Jan 3, 2026
Vendor
Mintplex Labs
Product
AnythingLLM
Classifications
CWE-204, CWE-203, T1087
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 3, 2026Record 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=< e287fab56089cf8fcea9ba579a3ecdeca0daa313

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mintplex Labs · AnythingLLMversion=< e287fab56089cf8fcea9ba579a3ecdeca0daa313

Published CVSS scores

5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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 exploitPublished

Weakness, pattern, technique

CWE-204Observable Response Discrepancy
CWE-203Observable Discrepancy
T1087Account Discovery

Public exploit references

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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