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CVE-2026-91768

IPv6 ACL bypass in FastCGI listen.allowed_clients due to partial address comparison (memcmp 12 bytes)

The IPv6 branch of the FastCGI client access check compares only the first 12 bytes of a 16-byte IPv6 address, so listen.allowed_clients matches on a /96 prefix instead of the exact address. An attacker who can source an address sharing the first 96 bits with an allowed one passes the check and reaches the FastCGI endpoint.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Php Php Group
Products
Php Php
CVE-2026-92842

OOB read / info leak in convert.* stream filters when line-break-chars contains NUL

The convert.base64-encode, convert.quoted-printable-encode and convert.quoted-printable-decode stream filters accept a line-break-chars option whose length is tracked separately from the string itself. The filter constructors duplicate the value with pestrdup(), which stops at the first NUL byte, while keeping the original length. When the filter later emits a line break it copies the recorded length out of the truncated allocation, reading past its end and placing adjacent heap bytes into the filter output.

CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
Vendors
Php Php Group
Products
Php Php
CVE-2026-91767

Heap-buffer-overflow in php_openssl_matches_wildcard_name on crafted server cert wildcard CN

php_openssl_matches_wildcard_name() in ext/openssl/xp_ssl.c underflows the length argument passed to memchr() when a TLS server certificate presents a wildcard name whose literal characters are together longer than the hostname being verified. A malicious server presenting such a certificate makes the PHP client read up to SIZE_MAX bytes past the end of a heap allocation. The path is reachable from any default client stream, because verify_peer_name is enabled by default.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Php Php Group
Products
Php Php
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-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-2025-14179

SQL injection in pdo_firebird via NUL bytes in quoted strings

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 PDO Firebird driver improperly handles NUL bytes when preparing SQL queries. During token-by-token query construction, a string token containing a NUL byte is copied via strncat(), which stops at the NUL byte, dropping the closing quote and causing subsequent SQL tokens to be interpreted as part of the string. This allows SQL injection when attacker-controlled values are quoted via PDO::quote() and embedded in SQL statements.

CVSS 4.0 · 7.4 High EPSS < 1% KEV · Not listed
Vendors
Php Php Group
Products
Php Php
CVE-2026-6722

Use-After-Free in SOAP using Apache map

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 SOAP extension's object deduplication mechanism stores pointers to PHP objects in a global map without incrementing their reference counts. When an apache:Map node contains duplicate keys, processing the second entry overwrites the first in the temporary result map, freeing the original PHP object while its stale pointer remains in the map. A subsequent href reference to the freed node can copy the dangling pointer into the result. As PHP string allocations can reclaim the freed memory region, an attacker with control over the SOAP request body can exploit this use-after-free to achieve remote code execution.

CVSS 4.0 · 9.5 Critical EPSS < 1% KEV · Not listed
Vendors
Php Php Group
Products
Php Php
CVE-2026-6735

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 target's machine when the target is viewing the PHP-FPM status page.

CVSS 4.0 · 7.3 High EPSS < 1% KEV · Not listed
Vendors
Php Php Group
Products
Php Php
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-lookup ctype functions - such as NetBSD - this can lead to accessing array with negative offset, which can trigger a denial of service.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
Vendors
Php Php Group
Products
Php Php
CVE-2026-7259

Null pointer dereference in php_mb_check_encoding() via mb_ereg_search_init()

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, a mismatch between encoding lists in Oniguruma and mbfl leads to  a NULL pointer dereference, resulting in a segmentation fault and denial of service. The vulnerability is exploitable when user-controlled input can influence the encoding passed to mb_regex_encoding().

CVSS 4.0 · 2.1 Low EPSS < 1% KEV · Not listed
Vendors
Php Php Group
Products
Php Php
CVE-2026-7261

SoapServer session-persisted object use-after-free via SOAP header fault

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 SoapServer is configured with SOAP_PERSISTENCE_SESSION, the handler object is persisted across requests via session storage. However, in the case SOAP requests results in an error, the persistance is handled incorrectly, resulting in freeing the object while keeping a pointer to it, which may lead to use-after-free. This may lead to memory corruption, information disclosure, or process crashes, with confidentiality, integrity, and availability impact on the vulnerable system.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
Vendors
Php Php Group
Products
Php Php