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High RLSA-2026:22649 6 CVEs

Important: php8.4 security update

Published Jun 5, 2026 · Updated Jun 5, 2026

Ecosystem: Rocky Linux

Summary

PHP is an HTML-embedded scripting language. PHP attempts to make it easy for developers to write dynamically generated web pages. PHP also offers built-in database integration for several commercial and non-commercial database management systems, so writing a database-enabled webpage with PHP is fairly simple. The most common use of PHP coding is probably as a replacement for CGI scripts.

Security Fix(es):

* PHP: PHP: Denial of Service via improper handling of signed characters in ctype functions (CVE-2026-7258)

* PHP: PHP-FPM: PHP-FPM: Cross-Site Scripting vulnerability via improper URL sanitation (CVE-2026-6735)

* php: NULL pointer dereference in SOAP apache:Map decoder with missing <value> (CVE-2026-7262)

* php: signed integer overflow in metaphone() (CVE-2026-7568)

* php: denial of service via DOMNode::C14N() (CVE-2026-7263)

* php: global buffer over-read in mb_convert_encoding() with attacker-supplied encoding (CVE-2026-6104)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Fixed packages 1

ReleasePackageFixed in
Rocky Linux · 10 php8.4 0:8.4.21-1.el10_2

Vulnerabilities 6

  • High 7.3
    CVE-2026-6735 Public exploit

    XSS within PHP-FPM status endpoint

    In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, 8.5.* before 8.5.6, due to improper sanitation of user data, it allows an attacker to compose an URL, which will cause the target to execute arbitrary JavaScript code (XSS) on the …

    PHP Group PHP php5 php7.0 Debian Ubuntu Azure Linux Alpine Wolfi
  • Medium 6.3
    CVE-2026-6104

    Global buffer over-read in mb_convert_encoding() with attacker-supplied encoding

    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 str…

    PHP Group PHP php8.4 php84 Debian Ubuntu Alpine
  • Medium 6.3
    CVE-2026-7258

    Out-of-bounds read in urldecode() on NetBSD

    In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, some functions, including urldecode(), pass signed char to ctype functions (like isxdigit()). On the systems with default signed char and optimized table-lo…

    PHP Group PHP php php8.2 Debian Ubuntu Azure Linux Alpine Wolfi
  • Medium 6.3
    CVE-2026-7263

    DoS attack via DOMNode::C14N()

    In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, DOMNode::C14N() method may process the XML data incorrectly, causing a circular linked list in the data structure representing the XML document. This may cause subsequent processing of the XML docume…

    PHP Group PHP php8.4 php85 Debian Ubuntu Alpine
  • Medium 6.3
    CVE-2026-7568

    Signed integer overflow in metaphone()

    In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the metaphone() function in ext/standard/metaphone.c uses a signed int variable to track the current position within the input string. If a string longer th…

    PHP Group PHP php5 php7.0 Debian Ubuntu Azure Linux Alpine Wolfi
  • Low 2.9
    CVE-2026-7262

    NULL pointer dereference in SOAP apache:Map decoder with missing <value>

    In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, when a SOAP server has a typemap configured, the decoding process contains a mistake which checks the wrong variable in case of missing value element.  This…

    PHP Group PHP php5 php7.0 Debian Ubuntu Azure Linux Alpine Wolfi

References

  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2468561
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2468566
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2468562
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2468573
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2468572
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2468565