Snappy code issues and vulnerabilities

Snappy is a PHP library developed by KNP Labs’ individual developers. It allows for the generation of thumbnails, snapshots, or PDFs from URLs or HTML pages. Versions of Snappy prior to 1.7.0 contained code vulnerabilities. These vulnerabilities stemmed from the xsl-style-sheet option, which coul...

CVE-2026-46683: Server-Side Request Forgery (SSRF)

Snappy is a PHP library allowing thumbnail, snapshot or PDF generation from a url or a html page. Prior to version 1.7.0, there is a SSRF and local file read vulnerability via the xsl-style-sheet option. This issue has been patched in version 1.7.0...

CVE-2026-46643: Improper Neutralization of Special Elements used in an OS Command

Snappy is a PHP library allowing thumbnail, snapshot or PDF generation from a url or a html page. Prior to version 1.7.1, on POSIX, escapeshellarg‘/usr/bin/wkhtmltopdf’ returns the literal string ‘/usr/bin/wkhtmltopdf’ with the single-quote characters included. isexecutable then looks for a file...

Snappy operating system command injection vulnerability

Snappy is a PHP library developed by KNP Labs’ individual developers. It allows for the generation of thumbnails, snapshots, or PDFs from URLs or HTML pages. Prior to Snappy 1.7.1, there was a vulnerability related to operating system command injection. This vulnerability stemmed from the...

CVE-2026-42587

A flaw was found in Netty. A remote attacker can bypass the configured decompression limit in the HttpContentDecompressor by sending a specially crafted compressed payload using Brotli br, Zstandard zstd, or Snappy content encodings. This can lead to unbounded memory allocation, resulting in an...

CVE-2026-42154

A flaw was found in Prometheus. An unauthenticated attacker can exploit the remote read endpoint /api/v1/read by sending a specially crafted, small snappy-compressed payload. This payload causes a disproportionately large memory allocation, leading to memory exhaustion and a Denial of Service DoS...

GHSA-VPR4-P6FQ-85JC Snappy: Binary path is never shell-escaped due to an inverted is_executable check

Impact On POSIX, escapeshellarg‘/usr/bin/wkhtmltopdf’ returns the literal string ‘/usr/bin/wkhtmltopdf’ with the single-quote characters included. isexecutable then looks for a file whose actual name contains those quote characters, which essentially never exists. The safe branch is dead code and...

Command Injection

Overview Affected versions of this package are vulnerable to Command Injection via the constructor when the binary path is sourced from user-influenced configuration, environment variables derived from request data, or concatenated with user-controlled fragments. An attacker can execute arbitrary...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the xsl-style-sheet option. An attacker can access internal or remote resources and read arbitrary local files by supplying crafted input to the xsl-style-sheet parameter. Remediation Upgrade...

Snappy : SSRF and local file read via the xsl-style-sheet option

Impact It impacts applications where: - the PHP daemon run with root permissions ; - the application is either running outside a container or has sensitive file access ; It could happens with this kind of workflows: php $stylesheet = $GET'stylesheet'; // = ‘file:///etc/passwd’ $pdf = new...

PT-2026-42693

Name of the Vulnerable Software and Affected Versions KnpLabs Snappy versions prior to 1.7.1 Description A shell injection issue exists on POSIX systems where the escapeshellarg function returns a string containing single-quote characters. This causes the is executable check to fail, as it search...

Denial-of-service (DoS)

github.com/prometheus/prometheus is vulnerable to Denial-of-service DoS. The vulnerability is due to improper validation of the declared decoded length in snappy-compressed requests sent to the remote read endpoint /api/v1/read, which allows an unauthenticated attacker to send a small malicious...

CVE-2026-46643

creationtimestamp| type| source ---|---|--- 2026-05-15 14:07:16+00:00| published-proof-of-concept| https://github.com/KnpLabs/snappy/security/advisories/GHSA-vpr4-p6fq-85jc...

SUSE CVE-2026-42587

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpContentDecompressor accepts a maxAllocation parameter to limit decompression buffer size and prevent decompression bomb attacks. This limit is correctly enforced for gzip and deflate...

Linux Distros Unpatched Vulnerability : CVE-2026-42587

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpContentDecompressor accepts a maxAllocation...

CVE-2026-42587

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpContentDecompressor accepts a maxAllocation parameter to limit decompression buffer size and prevent decompression bomb attacks. This limit is correctly enforced for gzip and deflate...

DEBIAN-CVE-2026-42587

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpContentDecompressor accepts a maxAllocation parameter to limit decompression buffer size and prevent decompression bomb attacks. This limit is correctly enforced for gzip and deflate...

CVE-2026-42587

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpContentDecompressor accepts a maxAllocation parameter to limit decompression buffer size and prevent decompression bomb attacks. This limit is correctly enforced for gzip and deflate...

CVE-2026-42587

Netty CVE-2026-42587 affects HttpContentDecompressor and DelegatingDecompressorFrameListener. Before 4.2.13.Final and 4.1.133.Final, maxAllocation is enforced for gzip/deflate but ignored for br, zstd, or snappy, allowing an attacker to bypass the decompression limit via Content-Encoding: br and ...

CVE-2026-42587 Netty: HttpContentDecompressor maxAllocation bypass via Content-Encoding: br/zstd/snappy enables decompression bomb DoS

Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, HttpContentDecompressor accepts a maxAllocation parameter to limit decompression buffer size and prevent decompression bomb attacks. This limit is correctly enforced for gzip and deflate...