CVE-2026-50755Network attack vector

Unauthenticated identity forgery via untrusted proxy header

Published Jul 21, 2026 · Updated Jul 21, 2026

Authentication bypass in DayuanJiang next-ai-draw-io 0.4.13 and earlier allows remote attackers to forge identities through X-Forwarded-For. The getUserIdFromRequest function in lib/user-id.ts treats the first client-supplied header value as an IP address and base64url-encodes it into the user identifier without validating the sender or proxy chain. Direct header control, or a proxy that preserves client-supplied values, permits quota bypass, telemetry corruption, and impersonation of identities derived from known IP addresses.

CVSS severityUnavailable
Unscored
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in DayuanJiang next-ai-draw-io 0.4.13 and earlier allows remote attackers to forge identities through X-Forwarded-For. The getUserIdFromRequest function in lib/user-id.ts treats the first client-supplied header value as an IP address and base64url-encodes it into the user identifier without validating the sender or proxy chain. Direct header control, or a proxy that preserves client-supplied values, permits quota bypass, telemetry corruption, and impersonation of identities derived from known IP addresses.

The record

CVE
CVE-2026-50755
Published
Jul 21, 2026
Updated
Jul 21, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-290, CWE-602, T1036
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 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?

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

No CVSS assessment is available in this record.

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 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-290Authentication Bypass by Spoofing
CWE-602Client-Side Enforcement of Server-Side Security
T1036Masquerading

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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