BIT-php-2026-6104

See a problem?
Import Source
https://github.com/bitnami/vulndb/tree/main/data/php/BIT-php-2026-6104.json
JSON Data
https://api.osv.dev/v1/vulns/BIT-php-2026-6104
Aliases
Published
2026-05-12T08:55:59Z
Modified
2026-09-10T16:01:45Z
Summary
Global buffer over-read in mb_convert_encoding() with attacker-supplied encoding
Details

In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, when an encoding name containing an embedded NUL byte is passed to mb_convert_encoding() or related mbstring functions, the code incorrectly assumes that when strncasecmp() returns 0 it means the strings have the same length. This can lead to out-of-bounds read of global memory, potentially causing a crash or information disclosure or crash. Affected functions include mb_convert_encoding(), mb_detect_encoding(), mb_convert_variables(), and mb_detect_order(), as well as the mbstring.detect_order and mbstring.http_output INI settings.

Database specific 
{
    "cpes": [
        "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*"
    ],
    "severity": "Critical"
}
References

Affected packages

Bitnami / php

Package

Name
php
Purl
pkg:bitnami/php

Severity

  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H CVSS Calculator

Affected ranges

Type
SEMVER
Events
Introduced
8.4.0
Fixed
8.4.21
Introduced
8.5.0
Fixed
8.5.6

Database specific

source 
"https://github.com/bitnami/vulndb/tree/main/data/php/BIT-php-2026-6104.json"