Weakness (CWE)
CWE-93: Improper Neutralization of CRLF Sequences
The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.
How to prevent it (2 mitigations)
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Implementation
Avoid using CRLF as a special sequence.
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Implementation
Appropriately filter or quote CRLF sequences in user-controlled input.
Source: MITRE CWE-93
284 results · Feed
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Medium 5.8
@fastify/busboy vulnerable to CRLF injection via multipart Content-Disposition filename and name
@fastify/busboy is a multipart form-data parser for Node.js. Its multipart part-header parser splits header lines only on the two-byte carriage-return line-feed sequence, so a lone carriage return or line feed embedded in a part header is not treated as a lin…
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Medium 6.9
HTTP/2 header field values containing CR, LF or NUL are passed to the application unvalidated in Bandit
Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in mtrudel bandit allows an unauthenticated remote attacker to smuggle CR, LF, or NUL characters into application-visible request headers via HTTP/2. Bandit.HTTP2.Stream.read_headers/1…
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High —
GeoLens's authorization and cache-scope flaws disclose private dataset data and metadata to unauthorized users (fixed in 1.2.4)
GeoLens 1.2.4 fixes a set of vulnerabilities, the most serious of which allow authenticated or anonymous users to obtain data and metadata for datasets they are not authorized to access. ### Impact - **Private record metadata disclosure.** Record contact, key…
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Medium 6.9
aiosmtplib: SMTP command injection via CR/LF in sender/recipient address
aiosmtplib is an asynchronous SMTP client for use with asyncio. Prior to 5.1.1, SMTP.mail(), SMTP.rcpt(), SMTP.vrfy(), and SMTP.expn() send caller-supplied addresses without rejecting embedded CR or LF bytes. Data after the line break is framed as additional …
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Medium 6.9
Joomla! Core - [20260802] - Improper CORS origin validation in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2
Joomla! Core - [20260802] - Improper CORS origin validation in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2 - An improper implementation prevented configured CORS origins from being properly validated in CORS requests.
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Medium 4.8
Joomla! Core - [20260801] - Response header injection in download views in Joomla 3.0.0-5.4.7, 6.0.0-6.1.2
Joomla! Core - [20260801] - Response header injection in download views in Joomla 3.0.0-5.4.7, 6.0.0-6.1.2 - Lack of output processing allowed a header injection in the multiple download views, leading to reflected file download / content-type confusion.
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Medium 5.3
MyBB: Email User CRLF injection
MyBB is free and open source forum software. Prior to 1.8.40, the Email User controller does not sanitize sender names correctly, resulting in mail header injection. member.php?action=do_emailuser accepts the fromname HTTP parameter for guests or the stored u…
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Medium 6.5
rsync < 3.5.0 Newline Injection via name-converter uid/gid mapping
rsync before 3.5.0 contains a newline injection vulnerability in the name-converter uid/gid mapping interface that allows local attackers to forge protocol messages by creating user or group names containing newline characters. Attackers can inject malicious …
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Medium 6.9
Local privilege escalation via improper input sanitization in execl() call
In Teltonika Networks RUTOS devices running versions 7.07.1 through 7.24.1 and TSWOS devices running versions 1.03 through 1.10, a vulnerability exists whereby a lower privileged user can escalate privileges to administrative level due to unsafe calls to an e…
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High 7.3
Kitty: Command injection into the child shell via chained @kitty-echo + @kitty-ssh DCS escape sequences
Kitty is a cross-platform GPU based terminal. Prior to 0.48.2, the @kitty-echo and @kitty-ssh DCS handlers in kitty/window.py write unauthenticated data to the child shell's stdin, where handle_remote_echo accepts printable shell command characters and handle…
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Critical 9.8
alseambusher crontab-ui - Unauthenticated RCE via Newline Injection in env_vars Parameter
An OS command injection vulnerability in alseambusher/crontab-ui through 0.4.2 allows an unauthenticated remote attacker to inject arbitrary cron job entries by sending a crafted GET request to /crontab with URL-encoded newlines in the env_vars parameter.
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Low 2.3
Libvirt: libvirt: newline injection in network xml dns txt/srv fields allows dnsmasq config directive injection
An injection vulnerability was found in libvirt's virtual network driver. The network XML parser does not strip newline characters from DNS TXT record value attributes and SRV record domain/target attributes. These values are written verbatim into the dnsmasq…
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Medium 5.3
Element Pack Addons for Elementor <= 8.3.15 - Unauthenticated SMTP Header Injection
The Element Pack Addons for Elementor plugin for WordPress is vulnerable to Email Header Injection in all versions up to, and including, 8.3.15 via the `element_pack_contact_form` AJAX action. This is due to insufficient sanitization of newline characters in …
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Medium 6.4
rclone: FTP Command Arguments Permit CRLF Injection When Custom Encoding Preserves Newlines
rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to 1.75.0, a valid but nondefault FTP filename encoding in backend/ftp/ftp.go can restore raw CR/LF immediately before an attacker-controlled p…
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Critical 9.9
boringproxy 0.10.0 SSH authorized_keys Injection via Tunnel Creation
boringproxy through 0.10.0 contains a newline injection vulnerability that allows authenticated low-privileged users with tunnel-creation permission to inject arbitrary lines into the server account's SSH authorized_keys file by supplying a percent-encoded ne…
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Low 2.1
YAML injection via unescaped newlines in ymlr document comments
Improper Neutralization of CRLF Sequences vulnerability in ufirstgroup ymlr (Elixir.Ymlr module) allows attackers to inject arbitrary content into generated YAML documents through document comments. Ymlr.document!/2 interpolates each caller-supplied comment s…
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Critical 9.1
Missing input validation / stripping of CRLF characters in SystemConfigManager
An unauthenticated remote attacker can inject malicious input into the ModbusServer application because it does not validate the input it fetches from MQTT. This may lead to integrity and availability loss.
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Medium 4.2
undici vulnerable to CRLF Injection via blob-like body 'type' property
undici does not validate the type property of a duck-typed blob-like request body before using it as the Content-Type header on the HTTP/1.1 dispatcher. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.9.0, an application…
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High 7.2
Heimdall Data Database Proxy generateFileContent CRLF Injection Remote Code Execution Vulnerability
Heimdall Data Database Proxy generateFileContent CRLF Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Heimdall Data Database Proxy. Authentication is required to …
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Medium 5.5
Netty: HAProxy V1 Protocol CRLF Injection via AF_UNIX Address
Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.136.Final and 4.2.16.Final, Netty's HAProxy encoder ( HAProxyMessageEncoder ) writes AF_UNIX source and destination socket addresses into the HAProxy V1 text protoc…
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Medium 6.5
Netty: STOMP CONNECT Frame Header Injection
Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.136.Final and 4.2.16.Final, Netty's STOMP encoder ( StompSubframeEncoder ) does not escape or validate header values in CONNECT and CONNECTED frames, so raw new…
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Medium 5.7
Netty: CRLF Injection via Multipart Filename in Netty HttpPostRequestEncoder
Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, HttpPostRequestEncoder constructs multipart HTTP request bodies by directly concatenating user-supplied filenames and field names into Cont…
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Medium 5.4
SuperPlane < 0.30.0 SMTP Header Injection via Webhook Event Title
SuperPlane before 0.30.0 contains an SMTP header injection vulnerability that allows unauthenticated attackers to inject arbitrary SMTP headers by including CRLF sequences in the event payload title field delivered via webhook. Attackers can manipulate the un…
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High 7.6
Sg3_utils: sg3_utils: arbitrary command execution via udev property injection in sg_inq --export
A flaw was found in sg3_utils. The sg_inq command, when invoked with the --export option, outputs device identification data without sanitizing control characters in SCSI name string fields. A newline character embedded in a device-supplied name string can in…
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Medium 6.3
Symfony: Email Header Injection via Non-Token Characters in Mime Parameter Names
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, Symfony\Component\Mime\Header\ParameterizedHeader validates and encodes parameter values but emits parameter names v…
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Medium 6.3CVE-2026-45067 Public exploit
Symfony: Email Header / SMTP Command Injection via CRLF in Symfony\Component\Mime\Address
### Description `Symfony\Component\Mime\Address` is the value-object every Symfony Mailer address (to/cc/bcc/from/reply-to) flows through; its constructor is documented as validating the address and throwing on invalid input, so developers treat it as a secur…
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Medium 5.1
Privilege Escalation via Improper Input Sanitization in TP-Link Archer VX1800v
A privilege escalation vulnerability exists in the HTTP authentication component in Archer VX1800v v1. Improper handling of user-controlled input may allow newline characters to be injected into internally constructed configuration data. An authenticated use…
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Medium 6.9
Kirby: Request header injection in `Http\Remote`
Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites and plugins using the Kirby Http Remote class, including Remote::request(), Remote::get(), and Remote::post(), to send outgoing HTTP requests with untrusted data in the h…
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Medium 5.3
WPForms <= 1.10.2 - Improper Neutralization of CRLF Sequences to Unauthenticated Email Header Injection via Reply-To Display Name
The WPForms – Easy Form Builder for WordPress – Contact Forms, Payment Forms, Surveys, & More plugin for WordPress is vulnerable to Improper Neutralization of CRLF Sequences ('CRLF Injection') in all versions up to, and including, 1.10.2 This is due to `get_r…
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High 7.5
Jenkins Script Security Plugin has a script security bypass vulnerability
Jenkins Script Security Plugin 1402.v94c9ce464861 and earlier does not reject Groovy AST transformation annotations carrying an extensions member, allowing attackers able to run sandboxed Groovy scripts to execute code outside the sandbox if a suitable script…
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Medium 4.8
guzzlehttp/psr7: CRLF Injection in HTTP Start-Line Serialization
guzzlehttp/psr7 is a PSR-7 HTTP message library implementation in PHP. Prior to 2.12.1, guzzlehttp/psr7 did not reject CR/LF characters in certain first-party HTTP start-line fields: the request method, protocol version, and response reason phrase. If an appl…
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High 8.1
Crawl4AI - Arbitrary File Write via output_path Symlink and TOCTOU
Crawl4AI before 0.8.8 contains an arbitrary file write vulnerability in the screenshot and PDF endpoints that allows unauthenticated attackers to write files outside the intended directory via symlink and time-of-check-time-of-use (TOCTOU) attacks on the outp…
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High —
skillctl: argument injection, path traversal in --dest, FIFO/device DoS, hardlink exfiltration, and commit-trailer forgery
## Impact Following the path-safety patches in [GHSA-wx3m-whqv-xv47](https://github.com/umanio-agency/skillctl/security/advisories/GHSA-wx3m-whqv-xv47) (v0.1.2), a comprehensive multi-angle audit surfaced five further vulnerabilities, now patched in v0.1.3: 1…
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Medium 5.8
Net::IMAP: Command Injection via ID command argument
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, when Net::IMAP#id is called with a hash argument, although the ID field value strings are correctly quoted (escaping quoted specials), they w…
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Medium 5.8
Net::IMAP: Command Injection via non-synchronizing literal in "raw" argument
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, several Net::IMAP commands accept a "raw data" argument that is sent verbatim after validation to prevent command injection. However, if a se…
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High 7.5
http-proxy-middleware: multipart/form-data field injection via unescaped CRLF in `fixRequestBody`
http-proxy-middleware is node.js http-proxy middleware. From 3.0.4 until 3.0.7 and 4.1.1, fixRequestBody() is the library's documented helper for re-emitting a request body that was already consumed by a body parser. When the outgoing Content-Type is multipar…
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Low 2.7
AIOHTTP: CRLF injection in multipart headers
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.0, attacker-controlled input included into multipart/payload headers can be used to modify a request to inject additional headers or similar. In the unlikely situati…
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Critical 9.1
Net::Statsite::Client versions through 1.1.0 for Perl allow metric injections
Net::Statsite::Client versions through 1.1.0 for Perl allow metric injections. Net::Statsite::Client is a client for the statsite protocol, which is a variant of statsd. Newlines are not removed from metric names, allowing metric injections. Values are not sa…
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Medium 5.9
undici vulnerable to HTTP header injection via Set-Cookie percent-decoding
Impact: undici's cookie parser in parseSetCookie percent-decodes cookie values via qsUnescape, turning encoded sequences like %0D%0A, %00, %3B, and %3D into their literal byte equivalents. RFC 6265 §5.4 does not specify any decoding and browsers do not decode…
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High 7.5
form-data does not escape CR/LF/quote in multipart field names and filenames (CRLF injection)
form-data is a library for creating readable multipart/form-data streams. In versions through 4.0.5, the `field` argument to `FormData#append` and the `filename` option are concatenated verbatim into the `Content-Disposition` header without escaping carriage …