CVE-2026-27579Public exploitNetwork attack vector

Account data disclosure via credentialed origin reflection

Published Feb 21, 2026 · Updated Feb 21, 2026

CORS misconfiguration in all versions of karnop CollabPlatform allows remote attackers to read account data through a victim's browser. The Appwrite /v1/account endpoint reflects an arbitrary Origin header while allowing credentials, exposing its authenticated JSON response cross-origin. A logged-in victim must visit an attacker-controlled site; exposed data includes user IDs, email addresses, MFA status, and account metadata.

CVSS severity7.4
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CORS misconfiguration in all versions of karnop CollabPlatform allows remote attackers to read account data through a victim's browser. The Appwrite /v1/account endpoint reflects an arbitrary Origin header while allowing credentials, exposing its authenticated JSON response cross-origin. A logged-in victim must visit an attacker-controlled site; exposed data includes user IDs, email addresses, MFA status, and account metadata.

The record

CVE
CVE-2026-27579
Published
Feb 21, 2026
Updated
Feb 21, 2026
Vendor
karnop
Product
CollabPlatform
Classifications
CWE-346, CWE-942, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 21, 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=<= master

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

karnop · CollabPlatformversion=<= master

Published CVSS scores

7.4GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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 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-346Origin Validation Error
CWE-942Permissive Cross-domain Security Policy with Untrusted Domains
T1189Drive-by Compromise

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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