CWE-93— CRLF Injection
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.— MITRE CWE catalog
291 active CVEs classified under this weakness category. Sourced from NVD, GHSA, and vendor advisories. Full definition on MITRE →
CVEs classified under CWE-93page 6 of 6
- CVE-2026-33606MEDIUMCVSS 4.8EG 4.82026-08-28
Mail content stored by a user can be crafted so that it is interpreted as dsync protocol commands when an administrator later runs dsync with the stream protocol, for example during a migration. Injected commands can modify mailbox state o…
- CVE-2026-55766MEDIUMCVSS 4.8EG 4.82026-06-19
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 reaso…
- CVE-2020-3561MEDIUMCVSS 4.7EG 4.72020-10-21
A vulnerability in the Clientless SSL VPN (WebVPN) of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to inject arbitrary HTTP headers in th…
- CVE-2026-1527MEDIUMCVSS 4.6EG 4.62026-03-12
ImpactWhen an application passes user-controlled input to the upgrade option of client.request(), an attacker can inject CRLF sequences (\r\n) to: * Inject arbitrary HTTP headers * Terminate the HTTP request prematurely and smugg…
- CVE-2026-115785MEDIUMCVSS 4.3EG 4.32026-10-23
An SMTP command injection vulnerability in the data-source testing functionality of Zimbra Collaboration Suite (ZCS) allows an ordinary authenticated user with account options enabled to inject CR/LF into the emailAddress inserted into an …
- CVE-2026-94216MEDIUMCVSS 4.3EG 4.32026-09-21
A vulnerability was determined in ST Engineering iDirect iDX and Evo iDX. This vulnerability affects unknown code of the file /authorize of the component HTTP Request Handler. Executing a manipulation of the argument Success can lead to ht…
- CVE-2026-43882MEDIUMCVSS 4.3EG 4.32026-05-11
WWBN AVideo is an open source video platform. In versions up to and including 29.0, the unauthenticated plugin/Scheduler/downloadICS.php endpoint passes attacker-controlled title, description, and joinURL parameters into Scheduler::downloa…
- CVE-2026-2400MEDIUMCVSS 4.3EG 4.32026-04-14
CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability exists that could cause application user credentials to reset when a Web Admin user alters the POST /setPCBEDesc request payload.
- CVE-2026-34975MEDIUMCVSS 4.3EG 4.32026-04-06
Plunk is an open-source email platform built on top of AWS SES. Prior to 0.8.0, a CRLF header injection vulnerability was discovered in SESService.ts, where user-supplied values for from.name, subject, custom header keys/values, and attach…
- CVE-2026-33635MEDIUMCVSS 4.3EG 4.32026-03-26
iCalendar is a Ruby library for dealing with iCalendar files in the iCalendar format defined by RFC-5545. Starting in version 2.0.0 and prior to version 2.12.2, .ics serialization does not properly sanitize URI property values, enabling IC…
- CVE-2026-3234MEDIUMCVSS 4.3EG 4.32026-03-12
A flaw was found in mod_proxy_cluster. This vulnerability, a Carriage Return Line Feed (CRLF) injection in the decodeenc() function, allows a remote attacker to bypass input validation. By injecting CRLF sequences into the cluster configu…
- CVE-2026-28296MEDIUMCVSS 4.3EG 4.32026-02-26
A flaw was found in the FTP GVfs backend. A remote attacker could exploit this input validation vulnerability by supplying specially crafted file paths containing carriage return and line feed (CRLF) sequences. These unsanitized sequences …
- CVE-2025-14531MEDIUMCVSS 4.3EG 4.32025-12-11
A vulnerability was found in code-projects Rental Management System 2.0. This affects an unknown function of the file Transaction.java of the component Log Handler. Performing manipulation results in crlf injection. The attack can be initi…
- CVE-2025-54972MEDIUMCVSS 4.3EG 4.32025-11-18
An improper neutralization of crlf sequences ('crlf injection') vulnerability in Fortinet FortiMail 7.6.0 through 7.6.3, FortiMail 7.4.0 through 7.4.5, FortiMail 7.2 all versions, FortiMail 7.0 all versions may allow an attacker to inject …
- CVE-2020-3246MEDIUMCVSS 4.3EG 4.32020-05-06
A vulnerability in the web server of Cisco Umbrella could allow an unauthenticated, remote attacker to perform a carriage return line feed (CRLF) injection attack against a user of an affected service. The vulnerability is due to insuffici…
- CVE-2019-15616MEDIUMCVSS 4.3EG 4.32020-02-04
Dangling remote share attempts in Nextcloud 16 allow a DNS pollution when running long.
- CVE-2007-4190MEDIUMCVSS v2 4.3EG 4.32007-08-08
CRLF injection vulnerability in Joomla! before 1.0.13 (aka Sunglow) allows remote attackers to inject arbitrary HTTP headers and probably conduct HTTP response splitting attacks via CRLF sequences in the url parameter. NOTE: this can be l…
- CVE-2026-84962MEDIUMCVSS 4.2EG 4.22026-09-03
An unauthorized user with key vault write access may cause an authorized client to issue arbitrary authenticated Google Cloud KMS API calls under the authorized user's identity, escalating database-level access into cloud key control and d…
- CVE-2020-15111MEDIUMCVSS 4.2EG 4.22020-07-20
In Fiber before version 1.12.6, the filename that is given in c.Attachment() (https://docs.gofiber.io/ctx#attachment) is not escaped, and therefore vulnerable for a CRLF injection attack. I.e. an attacker could upload a custom filename and…
- CVE-2026-35601MEDIUMCVSS 4.1EG 4.12026-04-10
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the CalDAV output generator builds iCalendar VTODO entries via raw string concatenation without applying RFC 5545 TEXT value escaping. User-controlled task tit…
- CVE-2026-43968MEDIUMCVSS 4.0EG 4.02026-05-11
Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in ninenines cowlib allows SSE event splitting and injection via unvalidated field values. cow_sse:event/1 in cowlib guards the id and event fields against \n but …
- CVE-2026-91831LOWCVSS 3.8EG 3.82026-10-19
The Subscribe to Comments WordPress plugin before 2.3.3 does not sanitise newline characters from a notification sender-name setting before using it in e-mail headers, allowing users with Author-level access and above to inject arbitrary e…
- CVE-2026-119417LOWCVSS 3.7EG 3.72026-10-30
CakePHP 4.5.12, 4.6.5, 5.1.8 through 5.1.10, 5.2.14 through 5.2.15, 5.3.7, and 5.4.0 through 5.4.3 contain an email header injection vulnerability because SmtpTransport and MailTransport strip only CRLF pairs from header values, an incompl…
- CVE-2026-119415LOWCVSS 3.7EG 3.72026-10-30
CakePHP through 5.4.3 contains a header injection vulnerability in FormDataPart that allows attackers to inject MIME part headers via unsanitized Content-Type and Content-ID values. Attackers can supply CR/LF sequences in attachment MIME t…
- CVE-2026-115303LOWCVSS 3.7EG 3.72026-10-29
The Contact Form by Supsystic WordPress plugin before 1.11.1 does not strip CR/LF characters or re-validate submitted field values before concatenating them into outgoing email headers when a form is configured to map a submitted field int…
- CVE-2026-118372LOWCVSS 3.7EG 3.72026-10-28
LibreSSL ocspcheck through 4.4.0 contains a CRLF injection vulnerability that allows attackers to inject HTTP headers by embedding CR/LF sequences in a certificate's AIA OCSP URI path. Because url2host() copies the path without rejecting c…
- CVE-2026-118371LOWCVSS 3.7EG 3.72026-10-28
LibreSSL through 4.4.0 contains a CRLF injection vulnerability in the libcrypto OCSP_sendreq_new() and OCSP_parse_url() functions, which write unvalidated request paths into the OCSP POST request line. Attackers can embed carriage return a…
- CVE-2026-49756LOWCVSS 3.7EG 3.72026-06-08
Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in wojtekmach Req allows multipart parameter smuggling via attacker-influenced part metadata. Req.Utils.encode_form_part/2 in lib/req/utils.ex builds the per-part …
- CVE-2026-48596LOWCVSS 3.7EG 3.72026-06-02
Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') vulnerability in elixir-tesla tesla allows HTTP header injection via Tesla.Multipart.add_content_type_param/2. Tesla.Multipart.add_content_type_…
- CVE-2026-28753LOWCVSS 3.7EG 3.72026-03-24
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_mail_smtp_module module due to the improper handling of CRLF sequences in DNS responses. This allows an attacker-controlled DNS server to inject arbitrary headers into SMTP u…
- CVE-2022-31151LOWCVSS 3.7EG 3.72022-07-21
Authorization headers are cleared on cross-origin redirect. However, cookie headers which are sensitive headers and are official headers found in the spec, remain uncleared. There are active users using cookie headers in undici. This may l…
- CVE-2026-121432LOWCVSS 3.5EG 3.52026-11-03
AzuraCast before 0.24.0 contains a CRLF injection vulnerability that allows low-privilege station users to inject playlist entries by embedding CR/LF sequences in mount or remote relay display_name values. Attackers with Station:MountPoint…
- CVE-2026-13666LOWCVSS 3.5EG 3.52026-09-18
An improper neutralization of CRLF sequences ('CRLF Injection') vulnerability in Sharing API in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote authenticated users to write…
- CVE-2026-43969LOWCVSS 3.2EG 3.22026-05-11
Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in ninenines cowlib allows HTTP request splitting and cookie smuggling via unvalidated cookie name and value fields. cow_cookie:cookie/1 in cowlib builds a client-…
- CVE-2026-55467LOWCVSS 2.5EG 2.52026-10-15
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, the cupsdCreateJob option-string builder in scheduler/job.c maps attacker-controlled destination-uri and pre-dial-string …
- CVE-2026-61477LOWCVSS 2.3EG 2.32026-08-07
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 verba…
- CVE-2026-65636LOWCVSS 2.1EG 2.12026-07-31
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 calle…
- CVE-2026-48861LOWCVSS 2.1EG 2.12026-06-02
Improper Neutralization of CRLF Sequences ('CRLF Injection') vulnerability in elixir-mint Mint allows HTTP Request Splitting and HTTP Request Smuggling. In lib/mint/http1/request.ex, the encode_request_line/2 function splices the caller-s…
- CVE-2026-113715LOWCVSS 2.0EG 2.02026-10-20
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, the stdlib venv creator reads generated pyvenv.cfg with str.splitlines() and merges parsed keys over virtualenv's selected configuration. An untruste…
- CVE-2026-13575UnratedEG not assessed2026-11-01
HTTP::Session versions before 0.54 for Perl allow memcached command injection via unfiltered session ids in HTTP::Session::Store::CHI. The session id from the client's cookie reaches the CHI cache unchanged. The sibling HTTP::Session::Sto…
- CVE-2026-28970MEDIUMEG not assessed2026-06-12
SwiftNIO: CRLF Injection in outbound HTTP request URI via NIOHTTPRequestHeadersValidator Programs using swift-nio is vulnerable to HTTP request smuggling and HTTP response splitting attacks, caused by insufficient validation of outbound H…
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