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CVE-2026-93682

Out-of-bounds read in the HTTP stream wrapper when following a redirect with an empty Location header

When the HTTP stream wrapper follows a redirect and the response carries a Location header with an empty value, the redirect code reads one byte past the end of the heap buffer holding the location. The value of that out-of-bounds byte decides which redirect target is built, so a malicious server controls whether the client is sent to the host root or to the current directory.

CVSS 3.1 · 5.8 Medium EPSS < 1% KEV · Not listed
Vendors
Php Php Group Redhat
Products
Php Php Hummingbird
CVE-2025-14181

Integer overflow to buffer overflow in soap HTTP parsing

The SOAP HTTP client guards its response buffer growth with a check that relies on signed integer overflow, which is undefined behaviour and is not guaranteed to trigger. When the check is optimised away, a malicious SOAP server can make the client allocate a buffer far smaller than the data it then writes into it, producing a heap buffer overflow.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Php Php Group Redhat
Products
Php Php Hummingbird
CVE-2025-1218

Various packet overreads in mysqlnd_writeprotocol.c

The mysqlnd wire protocol parser reads fields out of server packets before checking that the packet still holds enough bytes for them. A malicious or compromised MySQL server can send a truncated packet and make the client read past the end of the packet buffer, which is undefined behaviour and can crash the process.

CVSS 3.1 · 3.4 Low EPSS < 1% KEV · Not listed
Vendors
Microsoft Php Php Group
Products
Windows Php Php
CVE-2026-17545

PHP on Windows: Reserved Device Names Are Not Rejected Before File/Stream I/O which can cause DoS

On Windows, PHP's filesystem and stream APIs do not reject reserved device names such as CON, PRN, AUX, NUL, COM1 to COM9, LPT1 to LPT9, CONIN$ and CONOUT$ when they appear as a component of a path. An attacker-controlled filename therefore reaches CreateFileW() and opens a device instead of the regular file the application expected, which can block or hang the request and exhaust worker processes.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Microsoft Php Php Group
Products
Windows Php Php
CVE-2026-6103

Phar TAR phar_tar_number() Integer Overflow - Archive Entry Injection

phar_tar_number() parses the octal size field of a TAR header into a uint32_t with no overflow check. The field is 11 octal digits wide and holds values up to 0x1FFFFFFFF, so a size above 0xFFFFFFFF silently wraps. The parser then skips the wrong number of data blocks and interprets attacker-controlled file content as the next TAR header, which lets a crafted archive inject entries that PharData reports and extracts as if they were genuine.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Php Php Group Redhat
Products
Php Php Hummingbird
CVE-2026-91765

SOAP: Unbounded Recursion in Server-Side cleanup_xml_node

cleanup_xml_node() in the SOAP XML parser recurses once per XML nesting level with no depth limit. An unauthenticated attacker can post a SOAP request containing tens of thousands of nested elements to any SoapServer endpoint, exhaust the stack and crash the process. The same unbounded recursion exists in the SOAP value decoder and in the WSDL node search helper.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Php Php Group Redhat
Products
Php Php Hummingbird
CVE-2026-91766

Cross-origin credential leak in HTTP stream wrapper redirects

When the http:// stream wrapper follows a redirect it forwards the user-supplied Authorization, Cookie and Proxy-Authorization headers unchanged, even when the redirect target is a different host, a different port, or a downgrade from HTTPS to HTTP. A server that can steer a redirect therefore receives credentials that were only meant for the original origin. This is the same class of issue that libcurl fixed in 7.58.0 ( CVE-2018-1000007 https://github.com/advisories/GHSA-g7x2-hrfp-pv5f ).

CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
Vendors
Php Php Group
Products
Php Php
CVE-2026-91769

TLS Hostname Verification Falls Back to CN After SAN Mismatch

PHP's OpenSSL stream peer verification checks the certificate's subjectAltName entries first and, whenever no entry matches, falls back to the Common Name. RFC 6125 requires the CN to be ignored once the certificate presents any service identity, so a certificate carrying a non-matching DNS SAN was still accepted when its CN matched the requested peer_name. A certificate trusted by the client for one name can therefore be used to impersonate another.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Php Php Group Redhat
Products
Php Php Hummingbird
CVE-2022-37454

XKCP: buffer overflow in the SHA-3 reference implementation

The Keccak XKCP SHA-3 reference implementation before fdc6fef has an integer overflow and resultant buffer overflow that allows attackers to execute arbitrary code or eliminate expected cryptographic properties. This occurs in the sponge function interface.

CVSS 3.1 · 9.8 Critical EPSS 7.4% KEV · Not listed
Vendors
Debian Extended Keccak Code Package Project Fedoraproject and 6 more
Products
Debian Linux Extended Keccak Code Package Fedora and 6 more
CVE-2026-82416

FrankenPHP: Cross-request PHP session ID leak in worker mode when the session extension is a shared module

FrankenPHP is a modern application server for PHP. Prior to 1.12.5, FrankenPHP worker mode can retain PHP session state between requests when the session extension is loaded as a shared module and is unavailable through HAVE_PHP_SESSION at compile time. In this build configuration, frankenphp_reset_session_state() is compiled out, PS(id) can survive a request boundary, and a subsequent session_start() can ignore the new request's cookie because an identifier is already present. Under concurrent requests, session_id() can therefore return another client's identifier or a stale identifier from a previous request on the same worker thread, causing cross-user session exposure, possible session hijacking, and intermittent logout behavior. Builds with the session extension statically linked, including the official static binaries and Docker images, are not affected. This issue is fixed in version 1.12.5.

CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed
Vendors
Php
Products
Frankenphp
CVE-2026-85733

FrankenPHP: Docker images serve phpinfo() as the default index.php, leaking environment variables

FrankenPHP is a modern application server for PHP. Prior to 1.12.5, the official FrankenPHP Debian and Alpine Docker images include a default /app/public/index.php that executes phpinfo(). A derived image that does not overwrite this placeholder serves the diagnostics page in production and can disclose environment variables used for secrets, PHP configuration directives, loaded extensions, software versions, and system paths. Images built using the documented pattern with their own /app/public/index.php are not affected, and already derived images must be rebuilt or supplied with an application index to remove the exposed placeholder. This issue is fixed in version 1.12.5.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Php
Products
Frankenphp
CVE-2019-11050

Use-after-free in exif parsing under memory sanitizer

When PHP EXIF extension is parsing EXIF information from an image, e.g. via exif_read_data() function, in PHP versions 7.2.x below 7.2.26, 7.3.x below 7.3.13 and 7.4.0 it is possible to supply it with data what will cause it to read past the allocated buffer. This may lead to information disclosure or crash.

CVSS 3.1 · 4.8 Medium EPSS 7.6% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 4 more
Products
Ubuntu Linux Debian Linux Fedora and 5 more
CVE-2019-11049

mail() may release string with refcount==1 twice

In PHP versions 7.3.x below 7.3.13 and 7.4.0 on Windows, when supplying custom headers to mail() function, due to mistake introduced in commit 78f4b4a2dcf92ddbccea1bb95f8390a18ac3342e, if the header is supplied in lowercase, this can result in double-freeing certain memory locations.

CVSS 3.1 · 6.5 Medium EPSS 4.2% KEV · Not listed
Vendors
Debian Fedoraproject Microsoft and 2 more
Products
Debian Linux Fedora Windows and 2 more
CVE-2019-11045

DirectoryIterator class silently truncates after a null byte

In PHP versions 7.2.x below 7.2.26, 7.3.x below 7.3.13 and 7.4.0, PHP DirectoryIterator class accepts filenames with embedded \0 byte and treats them as terminating at that byte. This could lead to security vulnerabilities, e.g. in applications checking paths that the code is allowed to access.

CVSS 3.1 · 3.7 Low EPSS 8.8% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 4 more
Products
Ubuntu Linux Debian Linux Fedora and 5 more
CVE-2019-11044

link() silently truncates after a null byte on Windows

In PHP versions 7.2.x below 7.2.26, 7.3.x below 7.3.13 and 7.4.0 on Windows, PHP link() function accepts filenames with embedded \0 byte and treats them as terminating at that byte. This could lead to security vulnerabilities, e.g. in applications checking paths that the code is allowed to access.

CVSS 3.1 · 3.7 Low EPSS 5.1% KEV · Not listed
Vendors
Fedoraproject Php Tenable
Products
Fedora Php Security Center
CVE-2019-11046

Buffer underflow in bc_shift_addsub

In PHP versions 7.2.x below 7.2.26, 7.3.x below 7.3.13 and 7.4.0, PHP bcmath extension functions on some systems, including Windows, can be tricked into reading beyond the allocated space by supplying it with string containing characters that are identified as numeric by the OS but aren't ASCII numbers. This can read to disclosure of the content of some memory locations.

CVSS 3.1 · 3.7 Low EPSS 4.1% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 3 more
Products
Ubuntu Linux Debian Linux Fedora and 3 more
CVE-2026-17544

Out-of-bounds write in bccomp() via crafted operand and scale

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.

CVSS 4.0 · 8.1 High EPSS < 1% KEV · Not listed
Vendors
Php Php Group
Products
Php Php
CVE-2026-17543

SQL injection in ext-pgsql via E'...' backslash breakout

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.

CVSS 4.0 · 8.1 High EPSS < 1% KEV · Not listed
Vendors
Php Php Group
Products
Php Php
CVE-2026-7260

Stack overflow in phar with circular symlinks

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.

CVSS 4.0 · 5.4 Medium EPSS < 1% KEV · Not listed
Vendors
Php Php Group
Products
Php Php
CVE-2023-0567

password_verify() always returns true for some invalid hashes

In PHP 8.0.X before 8.0.28, 8.1.X before 8.1.16 and 8.2.X before 8.2.3, password_verify() function may accept some invalid Blowfish hashes as valid. If such invalid hash ever ends up in the password database, it may lead to an application allowing any password for this entry as valid.

CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed
Vendors
Php Redhat
Products
Php Enterprise Linux