Common Weakness Enumeration

CWE-93

Improper Neutralization of CRLF Sequences ('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.

CVE-2026-50639 (GCVE-0-2026-50639)

Vulnerability from cvelistv5 – Published: 2026-06-10 18:32 – Updated: 2026-06-19 15:33
VLAI
Title
Metrics::Any::Adapter::SignalFx versions before 0.04 for Perl does not protect against metric injections
Summary
Metrics::Any::Adapter::SignalFx versions before 0.04 for Perl does not protect against metric injections. The statsd protocol (and extensions such as dogstatsd) allow mutiple metrics, separated by newlines, to be sent per packet. Metrics::Any::Adapter::SignalFx which extends Metrics::Any::Adapter::Statsd, which has a similar vulnerability. In addition, the _labels function does not check tags labels newlines or statsd control characters. The labels can be used for metric injections.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-93 - Improper Neutralization of CRLF Sequences
  • CWE-150 - Improper Neutralization of Escape, Meta, or Control Sequences
Assigner
References
Impacted products
Vendor Product Version
PEVANS Metrics::Any::Adapter::SignalFx Affected: 0 , < 0.04 (custom)
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Show details on NVD website
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CVE-2026-5140 (GCVE-0-2026-5140)

Vulnerability from cvelistv5 – Published: 2026-04-29 13:02 – Updated: 2026-06-06 07:51
VLAI
Title
Authorization Bypass in TUBITAK BILGEM's Pardus Update
Summary
Improper neutralization of CRLF sequences ('CRLF injection') vulnerability in TUBITAK BILGEM Software Technologies Research Institute Pardus Update allows Authentication Bypass. This issue affects Pardus Update: from 0.6.3 before 0.6.4.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-93 - Improper neutralization of CRLF sequences ('CRLF injection')
Assigner
References
Impacted products
Date Public
2026-04-29 12:43
Credits
Çağrı ESER
Show details on NVD website
To clipboard 

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CVE-2026-55603 (GCVE-0-2026-55603)

Vulnerability from cvelistv5 – Published: 2026-06-22 20:07 – Updated: 2026-06-23 12:21
VLAI
Title
http-proxy-middleware: multipart/form-data field injection via unescaped CRLF in `fixRequestBody`
Summary
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 multipart/form-data, it rebuilds the body with handlerFormDataBodyData(), which interpolates each req.body key and value directly into the multipart wire format without neutralizing CR/LF. A \r\n inside a value (or key) lets an attacker close the current part and inject an entirely new form part. Because the proxy's own body parser saw a single opaque value, any gateway-side policy or validation performed on req.body is evaluated against a different set of fields than the upstream backend ultimately parses a request/parameter desynchronization across the trust boundary. This vulnerability is fixed in 3.0.7 and 4.1.1.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
Impacted products
Vendor Product Version
chimurai http-proxy-middleware Affected: >= 3.0.4, < 3.0.7
Affected: >= 4.0.0, < 4.1.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-55766 (GCVE-0-2026-55766)

Vulnerability from cvelistv5 – Published: 2026-06-23 15:07 – Updated: 2026-06-23 15:49
VLAI
Title
guzzlehttp/psr7: CRLF Injection in HTTP Start-Line Serialization
Summary
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 application placed attacker-controlled data into one of those fields and later serialized the PSR-7 message as raw HTTP/1.x, for example with Message::toString() or an equivalent serializer, the serialized message could contain attacker-controlled header lines. The issue can also be reached through Message::parseRequest() or Message::parseResponse() when malformed raw messages are parsed into first-party PSR-7 objects and then serialized again. Creating or modifying a Request, Response, or other PSR-7 object alone is not sufficient. The issue requires the malformed message to be serialized and written to the network, forwarded, replayed, or otherwise processed by software that does not independently reject the malformed start line. This vulnerability is fixed in 2.12.1.
Severity
4.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
  • CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Assigner
References
Impacted products
Vendor Product Version
guzzle psr7 Affected: < 2.12.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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          "url": "https://github.com/guzzle/psr7/security/advisories/GHSA-vm85-hxw5-5432"
        }
      ],
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    "dateReserved": "2026-06-17T14:34:51.881Z",
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CVE-2026-6351 (GCVE-0-2026-6351)

Vulnerability from cvelistv5 – Published: 2026-04-16 02:39 – Updated: 2026-04-16 13:02
VLAI
Title
Openfind｜MailGates/MailAudit - CRLF Injection
Summary
MailGates/MailAudit developed by Openfind has a CRLF Injection vulnerability, allowing unauthenticated remote attackers to exploit this vulnerability to read system files.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-93 - Improper neutralization of CRLF sequences ('CRLF injection')
Assigner
References
Impacted products
Vendor Product Version
Openfind MailGates Affected: 6.0 , < 6.1.10.054 (custom)
Affected: 5.0 , < 5.2.10.099 (custom)
Create a notification for this product.
Openfind MailAudit Affected: 6.0 , < 6.1.10.054 (custom)
Affected: 5.0 , < 5.2.10.099 (custom)
Create a notification for this product.
Date Public
2026-04-16 02:34
Show details on NVD website
To clipboard 

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CVE-2026-8722 (GCVE-0-2026-8722)

Vulnerability from cvelistv5 – Published: 2026-06-03 23:45 – Updated: 2026-06-19 15:33
VLAI
Title
Net::Async::Statsd::Client versions through 0.005 for Perl allow metric injections
Summary
Net::Async::Statsd::Client versions through 0.005 for Perl allow metric injections. The metric names are not checked for newlines, colons or pipes. Metrics generated from untrusted sources could inject additional statsd metrics.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-93 - Improper Neutralization of CRLF Sequences
  • CWE-150 - Improper Neutralization of Escape, Meta, or Control Sequences
Assigner
References
Impacted products
Vendor Product Version
TEAM Net::Async::Statsd::Client Affected: 0 , ≤ 0.005 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-8788 (GCVE-0-2026-8788)

Vulnerability from cvelistv5 – Published: 2026-05-18 06:34 – Updated: 2026-06-19 15:34
VLAI
Title
Net::Statsd::Lite versions through 0.10.0 for Perl allowed metric injections
Summary
Net::Statsd::Lite versions through 0.10.0 for Perl allowed metric injections. The values from the set_add method were not checked for newlines, colons or pipes. Metrics generated from untrusted sources could inject additional statsd metrics. Note that version 0.9.0 fixed a similar issue CVE-2026-46719 for metric names.
Severity
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-93 - Improper Neutralization of CRLF Sequences
  • CWE-150 - Improper Neutralization of Escape, Meta, or Control Sequences
Assigner
References
Impacted products
Vendor Product Version
RRWO Net::Statsd::Lite Affected: 0 , ≤ 0.10.0 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-9270 (GCVE-0-2026-9270)

Vulnerability from cvelistv5 – Published: 2026-06-05 14:49 – Updated: 2026-06-08 18:17
VLAI
Title
DataDog::DogStatsd versions through 0.07 for Perl allow metric injections
Summary
DataDog::DogStatsd versions through 0.07 for Perl allow metric injections. DataDog::DogStatsd does not properly sanitise input, allowing metric injections of data from untrusted sources. The send_stats method does not remove newlines from metric names ($stat variable), allowing attackers to change the metric name prefix. The send_stats method does not validate the content of the value ($delta variable), allowing attackers to inject metrics, especially from methods that do not restrict the data type for the value, such as set, gauge, count and histogram. The send_stats method does not validate the content of the tags, which may contain newlines, pipes and colons that allow metric injections. Note that the SYNOPSIS shows an example of passing a website form "loginName" parameter as a tag, which is unsafe.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-93 - Improper Neutralization of CRLF Sequences
  • CWE-150 - Improper Neutralization of Escape, Meta, or Control Sequences
Assigner
References
Impacted products
Vendor Product Version
BINARY DataDog::DogStatsd Affected: 0 , ≤ 0.07 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-9679 (GCVE-0-2026-9679)

Vulnerability from cvelistv5 – Published: 2026-06-17 16:56 – Updated: 2026-06-23 16:12
VLAI
Title
undici vulnerable to HTTP header injection via Set-Cookie percent-decoding
Summary
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 either. Applications that parse a Set-Cookie header and then forward the parsed value into a response header (proxies, middleware, SSR frameworks) become vulnerable to HTTP response header injection: an attacker-controlled upstream can inject arbitrary Set-Cookie, Location, or Cache-Control headers into the application's downstream response, enabling session fixation, open redirect, or cache poisoning. Affected applications are those that use undici's cookie parsing (parseSetCookie, parseCookie, getSetCookies) and forward the parsed cookie value into a response header. This was introduced in undici 7.0.0 via PR #3789. Patches: Upgrade to undici v6.26.0, v7.28.0 or v8.5.0. Workarounds: If upgrade is not immediately possible, do not forward values returned by parseSetCookie/parseCookie/getSetCookies directly into response headers; sanitize the value first to strip or reject CR, LF, NUL, ;, and = bytes.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
Impacted products
Vendor Product Version
undici undici Affected: 0 , < 6.26.0 (semver)
Unaffected: 6.26.0 (semver)
Affected: 7.0.0 , < 7.28.0 (semver)
Unaffected: 7.28.0 (semver)
Affected: 8.0.0 , < 8.5.0 (semver)
Unaffected: 8.5.0 (semver)
Create a notification for this product.
Credits
tndud042713 mcollina KhafraDev UlisesGascon
Show details on NVD website
To clipboard 

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Mitigation

Phase: Implementation

Description:

  • Avoid using CRLF as a special sequence.
Mitigation

Phase: Implementation

Description:

  • Appropriately filter or quote CRLF sequences in user-controlled input.
CAPEC-15: Command Delimiters

An attack of this type exploits a programs' vulnerabilities that allows an attacker's commands to be concatenated onto a legitimate command with the intent of targeting other resources such as the file system or database. The system that uses a filter or denylist input validation, as opposed to allowlist validation is vulnerable to an attacker who predicts delimiters (or combinations of delimiters) not present in the filter or denylist. As with other injection attacks, the attacker uses the command delimiter payload as an entry point to tunnel through the application and activate additional attacks through SQL queries, shell commands, network scanning, and so on.

CAPEC-81: Web Server Logs Tampering

Web Logs Tampering attacks involve an attacker injecting, deleting or otherwise tampering with the contents of web logs typically for the purposes of masking other malicious behavior. Additionally, writing malicious data to log files may target jobs, filters, reports, and other agents that process the logs in an asynchronous attack pattern. This pattern of attack is similar to "Log Injection-Tampering-Forging" except that in this case, the attack is targeting the logs of the web server and not the application.

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