CVE-2026-4132Network attack vector

Administrator RCE via arbitrary credential-file write

Published Apr 22, 2026 · Updated Apr 22, 2026

External file-path control in Dimitar Ivanov HTTP Headers 1.19.2 and earlier allows remote authenticated users to execute PHP code. The apache_auth_credentials() function inserts the unsanitized hh_www_authenticate_user value into credential content, while update_auth_credentials() writes it to the unchecked hh_htpasswd_path destination. Administrator access is required; control of the destination and content permits arbitrary server-side file writes and PHP execution.

CVSS severity7.2
High
EPSS probability1.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

External file-path control in Dimitar Ivanov HTTP Headers 1.19.2 and earlier allows remote authenticated users to execute PHP code. The apache_auth_credentials() function inserts the unsanitized hh_www_authenticate_user value into credential content, while update_auth_credentials() writes it to the unchecked hh_htpasswd_path destination. Administrator access is required; control of the destination and content permits arbitrary server-side file writes and PHP execution.

The record

CVE
CVE-2026-4132
Published
Apr 22, 2026
Updated
Apr 22, 2026
Vendor
Dimitar Ivanov
Product
HTTP Headers
Classifications
CWE-73, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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=0 <=1.19.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Dimitar Ivanov · HTTP Headersversion=0 <=1.19.2

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-73External Control of File Name or Path
T1505.003Web Shell

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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