Attacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption in PHP versions from 8.4.* before 8.4.24 and from 8.5.* before 8.5.9.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-6131a972fe advisory.

    **PHP version 8.5.9** (30 Jul 2026)

    **Core:**

    * Fixed bug [GH-22290](https://github.com/php/php-src/issues/22290) (AST pretty printing does not     correctly handle strings containing NUL). (iliaal)
    * Fixed bug [GH-22206](https://github.com/php/php-src/issues/22206) (missing return in global register     detection). (P3p111n0)
    * Lock unmodified readonly properties for modification after clone-with. (NickSdot)

    **BCMath:**

    * Fixed [GHSA-x692-q9x7-8c3f](https://github.com/php/php-src/security/advisories/GHSA-x692-q9x7-8c3f)     (Out-of-bounds write in bccomp()). (**CVE-2026-17544**) (Recep Asan)

    **Calendar:**

    * Fixed bug [GH-22602](https://github.com/php/php-src/issues/22602) (gregoriantojd() and juliantojd()     integer overflow with INT_MAX year). (arshidkv12)

    **Date:**

    * Update timelib to 2022.17. (Derick)
    * Fixed bug [GH-19803](https://github.com/php/php-src/issues/19803) (Parsing a string with a single white     space does create an error). (Derick)
    * Fixed Unix timestamps in February of the year 0 are misparsed with @-notation. (LukasGelbmann)
    * Fixed bug [GH-11310](https://github.com/php/php-src/issues/11310) (__debugInfo does nothing on userland     classes extending Date classes). (Derick)

    **DBA:**

    * Fixed OOB read on malformed length field in dba flatfile handler. (alhudz)

    **DOM:**

    * Fixed bug [GH-22570](https://github.com/php/php-src/issues/22570) (Stack overflow when serializing a     deeply nested Dom\XMLDocument). (iliaal)
    * Fixed getElementsByClassName() item() returning the wrong element on random access. (David Carlier)

    **Exif:**

    * Fixed bug [GH-11020](https://github.com/php/php-src/issues/11020) (exif_read_data() emits a spurious     Illegal IFD size warning when an IFD is not followed by a next-IFD offset). (Eyp Can Akman)


    **Hash:**

    * Fixed bug [GH-18173](https://github.com/php/php-src/issues/18173) (ext/hash relies on implementation-     defined malloc alignment). (iliaal)

    **ODBC:**

    * Fixed bug [GH-22668](https://github.com/php/php-src/issues/22668) (Heap buffer over-read when a column     value exceeds the driver-reported display size). (iliaal)

    **Opcache:**

    * Fixed bug [GH-22158](https://github.com/php/php-src/issues/22158) (Tracing JIT dispatches the observer     begin handler through the wrong run_time_cache slot on megamorphic calls). (ptondereau, iliaal)
    * Fixed bug [GH-22443](https://github.com/php/php-src/issues/22443) (Tracing JIT SIGSEGV on megamorphic     dynamic calls from an undereferenced run_time_cache map_ptr offset). (iliaal)
    * Fixed bug [GH-21770](https://github.com/php/php-src/issues/21770) (Infinite recursion in property hook     getter in opcache preloaded trait). (iliaal)

    **OpenSSL:**

    * Fixed timeout for supplemental read at end of a blocking stream in SSL stream wrapper. (ilutov)

    **Intl:**

    * Fixed Locale::lookup() and locale_lookup() to return NULL instead of the fallback locale when a language     tag cannot be canonicalized. (Weilin Du)
    * Fixed memory leaks when calling Collator::__construct() or Spoofchecker::__construct() twice. (Weilin     Du)
    * Fixed memory leak when calling IntlListFormatter::__construct() twice. (Weilin Du)
    * Fixed IntlChar methods leaving stale global error state after successful calls. (Xuyang Zhang)

    **PDO_ODBC:**

    * Fixed bug [GH-20726](https://github.com/php/php-src/issues/20726) (Crash with ODBC connection pooling     when the DSN carries no credentials). (iliaal)
    * Fixed bug [GH-22667](https://github.com/php/php-src/issues/22667) (Heap buffer over-read when a column     value exceeds the driver-reported display size). (iliaal)
    * Fixed bug [GH-22666](https://github.com/php/php-src/issues/22666) (Heap buffer overflow when an output     parameter value is longer than the declared maxlen). (iliaal)
    * Fixed bug [GH-22665](https://github.com/php/php-src/issues/22665) (Out-of-bounds write when the ODBC     driver reports a diagnostic message length beyond the error buffer). (iliaal)

    **PGSQL:**

    * Fixed [GHSA-7qpv-r5mr-78m4](https://github.com/php/php-src/security/advisories/GHSA-7qpv-r5mr-78m4) (SQL     injection via E'...' backslash breakout). (**CVE-2026-17543**) (ilutov)

    **Phar:**

    * Fixed inconsistent handling of the magic .phar directory. Paths such as /.phar remain protected,     while non-magic paths that merely start with .phar are handled consistently across file and directory     creation, copying, ArrayAccess, stream lookup, directory iteration and extraction. (Weilin Du)
    * Fixed [GHSA-vc5h-9ppw-p5f3](https://github.com/php/php-src/security/advisories/GHSA-vc5h-9ppw-p5f3)     (Crash via recursive symlinks). (**CVE-2026-7260**) (Jakub Zelenka)

    **PHPDBG:**

    * Fixed bug [GH-17387](https://github.com/php/php-src/issues/17387) (Trivial crash in phpdbg lexer).
    (iliaal)
    * Fixed fleaked lowercased lookup keys in phpdbg_resolve_opline_break. (jorgsowa)
    * Fixed off-by-one in phpdbg_safe_class_lookup() causing class lookups to always fail during phpdbg's     signal-safe interruption path. (jorgsowa)

    **Reflection:**

    * Fixed bug [GH-22324](https://github.com/php/php-src/issues/22324) (Ignore leading namespace separator in     ReflectionParameter::__construct()). (jorgsowa)
    * Fixed bug [GH-22441](https://github.com/php/php-src/issues/22441) (ReflectionClass::hasProperty() and     getProperty() ignore dynamic properties shadowing a private parent property). (iliaal)
    * Fixed bug [GH-22658](https://github.com/php/php-src/issues/22658) (ReflectionConstant::__toString() with     a string value with null bytes truncates output). (DanielEScherzer)
    * Fixed bug [GH-22683](https://github.com/php/php-src/issues/22683)     (Reflection(Class)Constant::__toString() should not warn on NAN conversions). (Khaled Alam)
    * Fixed bug [GH-22681](https://github.com/php/php-src/issues/22681) (Reflection*::__toString() truncates     on null bytes). (DanielEScherzer)

    **Session:**

    * Fixed bug [GH-21314](https://github.com/php/php-src/issues/21314) (Different session garbage collector     behavior between PHP 8.3 and PHP 8.5). (jorgsowa)

    **SPL:**

    * Fix   class_parents for classes with leading slash in non-autoload mode. (jorgsowa)
    * Ignore leading back-slash in class_parents(), class_implements(), and class_uses(). (jorgsowa)
    * Fixed bug [GH-16217](https://github.com/php/php-src/issues/16217) (SplFileObject::fputcsv() on an     uninitialized object segfaults). (iliaal)

    **Standard:**

    * Fixed bug [GH-22395](https://github.com/php/php-src/issues/22395) (base_convert() outputs at most 64     characters). (Weilin Du)
    * Fixed bug [GH-22678](https://github.com/php/php-src/issues/22678) (Use-after-free in array_multisort()     when the comparator mutates the array being sorted). (azchin, iliaal)

    **URI:**

    * Fixed behavior of Uri\WhatWg\Url wither methods with regards to empty opaque hosts. (kocsismate)
    * Fixed bug [GH-22628](https://github.com/php/php-src/issues/22628) (Percent-encoding of caret in WHATWG     URL paths is not performed). (kocsismate)
    * Fixed bug [GH-22629](https://github.com/php/php-src/issues/22629) (WHATWG Validation error incorrect     with empty host and non-empty userinfo). (kocsismate)

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6406 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6406-1                   security@debian.org     https://www.debian.org/security/                     Salvatore Bonaccorso     July 31, 2026                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : php8.4     CVE ID         : CVE-2026-7260 CVE-2026-17543 CVE-2026-17544     Debian Bug     : 1143153

    Multiple security issues were found in PHP, a widely-used open source     general purpose scripting language, which could result in denial of     service, SQL injection, information disclosure or the execution of     arbitrary code.

    For the stable distribution (trixie), these problems have been fixed in     version 8.4.24-1~deb13u1.

    We recommend that you upgrade your php8.4 packages.

    For the detailed security status of php8.4 please refer to its security     tracker page at:
    https://security-tracker.debian.org/tracker/php8.4

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Attacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption     in PHP versions from 8.4.* before 8.4.24 and from 8.5.* before 8.5.9. (CVE-2026-17544)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of PHP installed on the remote host is prior to 8.4.24. It is, therefore, affected by multiple vulnerabilities as referenced in the Version 8.4.24 advisory.

  - Improper escaping of backslashes in attacker-provided parameters would allow for trivial SQL injection in     PHP versions from 8.2.* before 8.2.33, from 8.3.* before 8.3.33, from 8.4.* before 8.4.24, and from 8.5.*     before 8.5.9. (CVE-2026-17543)

  - Attacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption     in PHP versions from 8.4.* before 8.4.24 and from 8.5.* before 8.5.9. (CVE-2026-17544)

  - Circular symbolic links in phar archives could lead to unbounded recursion, exhausting the C stack and     crashing the PHP process, in PHP versions from 8.2.* before 8.2.33, from 8.3.* before 8.3.33, from 8.4.*     before 8.4.24, and from 8.5.* before 8.5.9. (CVE-2026-7260)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of PHP installed on the remote host is prior to 8.5.9. It is, therefore, affected by multiple vulnerabilities as referenced in the Version 8.5.9 advisory.

  - Improper escaping of backslashes in attacker-provided parameters would allow for trivial SQL injection in     PHP versions from 8.2.* before 8.2.33, from 8.3.* before 8.3.33, from 8.4.* before 8.4.24, and from 8.5.*     before 8.5.9. (CVE-2026-17543)

  - Attacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption     in PHP versions from 8.4.* before 8.4.24 and from 8.5.* before 8.5.9. (CVE-2026-17544)

  - Circular symbolic links in phar archives could lead to unbounded recursion, exhausting the C stack and     crashing the PHP process, in PHP versions from 8.2.* before 8.2.33, from 8.3.* before 8.3.33, from 8.4.*     before 8.4.24, and from 8.5.* before 8.5.9. (CVE-2026-7260)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
331525	Fedora 44 : php (2026-6131a972fe)	Nessus	Fedora Local Security Checks	critical
331516	Debian dsa-6406 : libapache2-mod-php8.4 - security update	Nessus	Debian Local Security Checks	critical
331286	Linux Distros Unpatched Vulnerability : CVE-2026-17544	Nessus	Misc.	critical
331281	PHP 8.4.x < 8.4.24 Multiple Vulnerabilities SQLI	Nessus	CGI abuses	critical
331218	PHP 8.5.x < 8.5.9 Multiple Vulnerabilities SQLI	Nessus	CGI abuses	critical

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