Common Weakness Enumeration
CWE-93
AllowedImproper Neutralization of CRLF Sequences ('CRLF Injection')
Abstraction: Base · Status: Draft
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.
385 vulnerabilities reference this CWE, most recent first.
CVE-2024-20337 (GCVE-0-2024-20337)
Vulnerability from cvelistv5 – Published: 2024-03-06 16:30 – Updated: 2024-08-01 21:59
VLAI
EPSS
VEX
Summary
A vulnerability in the SAML authentication process of Cisco Secure Client could allow an unauthenticated, remote attacker to conduct a carriage return line feed (CRLF) injection attack against a user.
This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a crafted link while establishing a VPN session. A successful exploit could allow the attacker to execute arbitrary script code in the browser or access sensitive, browser-based information, including a valid SAML token. The attacker could then use the token to establish a remote access VPN session with the privileges of the affected user. Individual hosts and services behind the VPN headend would still need additional credentials for successful access.
Severity
8.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-03-09 05:00 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Secure Client |
Affected:
4.9.00086
Affected: 4.9.01095 Affected: 4.9.02028 Affected: 4.9.03047 Affected: 4.9.03049 Affected: 4.9.04043 Affected: 4.9.04053 Affected: 4.9.05042 Affected: 4.9.06037 Affected: 4.10.00093 Affected: 4.10.01075 Affected: 4.10.02086 Affected: 4.10.03104 Affected: 4.10.04065 Affected: 4.10.04071 Affected: 4.10.05085 Affected: 4.10.05095 Affected: 4.10.05111 Affected: 4.10.06079 Affected: 4.10.06090 Affected: 4.10.07061 Affected: 4.10.07062 Affected: 4.10.07073 Affected: 5.0.00238 Affected: 5.0.00529 Affected: 5.0.00556 Affected: 5.0.01242 Affected: 5.0.02075 Affected: 5.0.03072 Affected: 5.0.03076 Affected: 5.0.04032 Affected: 5.0.05040 Affected: 5.1.0.136 Affected: 5.1.1.42 |
|
| cisco | secure_client |
Affected:
4.10.00093
Affected: 4.10.01075 Affected: 4.10.02086 Affected: 4.10.03104 Affected: 4.10.04065 Affected: 4.10.04071 Affected: 4.10.05085 Affected: 4.10.05095 Affected: 4.10.05111 Affected: 4.10.06079 Affected: 4.10.06090 Affected: 4.10.07061 Affected: 4.10.07062 Affected: 4.10.07073 Affected: 4.9.00086 Affected: 4.9.01095 Affected: 4.9.02028 Affected: 4.9.03047 Affected: 4.9.03049 Affected: 4.9.04043 Affected: 4.9.04053 Affected: 4.9.05042 Affected: 4.9.06037 Affected: 5.0.00238 Affected: 5.0.00529 Affected: 5.0.00556 Affected: 5.0.01242 Affected: 5.0.02075 Affected: 5.0.03072 Affected: 5.0.03076 Affected: 5.0.04032 Affected: 5.1.0.136 Affected: 5.1.1.42 cpe:2.3:a:cisco:secure_client:4.10.00093:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.10.01075:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.10.02086:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.10.03104:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.10.04065:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.10.04071:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.10.05085:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.10.05095:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.10.05111:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.10.06079:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.10.06090:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.10.07061:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.10.07062:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.10.07073:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.9.00086:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.9.01095:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.9.02028:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.9.03047:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.9.03049:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.9.04043:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.9.04053:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.9.05042:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:4.9.06037:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:5.0.00238:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:5.0.00529:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:5.0.00556:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:5.0.01242:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:5.0.02075:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:5.0.03072:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:5.0.03076:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:5.0.04032:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:5.1.0.136:*:*:*:*:*:*:* cpe:2.3:a:cisco:secure_client:5.1.1.42:*:*:*:*:*:*:* |
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CVE-2024-7472 (GCVE-0-2024-7472)
Vulnerability from cvelistv5 – Published: 2024-10-29 12:49 – Updated: 2025-10-15 12:49
VLAI
EPSS
VEX
Title
Email Injection Vulnerability in lunary-ai/lunary
Summary
lunary-ai/lunary v1.2.26 contains an email injection vulnerability in the Send email verification API (/v1/users/send-verification) and Sign up API (/auth/signup). An unauthenticated attacker can inject data into outgoing emails by bypassing the extractFirstName function using a different whitespace character (e.g., \xa0). This vulnerability can be exploited to conduct phishing attacks, damage the application's brand, cause legal and compliance issues, and result in financial impact due to unauthorized email usage.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-29 13:52 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| lunary-ai | lunary-ai/lunary |
Affected:
unspecified , < 1.4.10
(custom)
|
|
| lunary-ai | lunary |
Affected:
0 , < 1.4.10
(custom)
cpe:2.3:a:lunary-ai:lunary:*:*:*:*:*:*:*:* |
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CVE-2024-5193 (GCVE-0-2024-5193)
Vulnerability from cvelistv5 – Published: 2024-05-22 10:31 – Updated: 2026-01-05 19:02 X_Open Source
VLAI
EPSS
VEX
Title
Ritlabs TinyWeb Server Request crlf injection
Summary
A security vulnerability has been detected in Ritlabs TinyWeb Server 1.94. This vulnerability affects unknown code of the component Request Handler. The manipulation with the input %0D%0A leads to crlf injection. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 1.99 is able to resolve this issue. The identifier of the patch is d49c3da6a97e950975b18626878f3ee1f082358e. It is suggested to upgrade the affected component. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-22 15:07 UTC
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.265830 | vdb-entrytechnical-descriptionmitigationpatch |
| https://vuldb.com/?ctiid.265830 | signaturepermissions-required |
| https://vuldb.com/?submit.333059 | third-party-advisory |
| https://github.com/DMCERTCE/CRLF_Tiny | exploit |
| https://github.com/maximmasiutin/TinyWeb/commit/d… | patch |
| https://github.com/maximmasiutin/TinyWeb/releases… | patch |
| https://www.masiutin.net/tinyweb-cve-2024-5193.html | mitigation |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Ritlabs | TinyWeb Server |
Affected:
1.94
Unaffected: 1.99 |
|
| ritlabs | tinyweb |
Affected:
1.94
cpe:2.3:a:ritlabs:tinyweb:*:*:*:*:*:*:*:* |
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CVE-2024-1226 (GCVE-0-2024-1226)
Vulnerability from cvelistv5 – Published: 2024-03-12 15:07 – Updated: 2024-08-05 17:48
VLAI
EPSS
VEX
Title
Multiple vulnerabilities in Rejetto's Http File Server
Summary
The software does not neutralize or incorrectly neutralizes certain characters before the data is included in outgoing HTTP headers. The inclusion of invalidated data in an HTTP header allows an attacker to specify the full HTTP response represented by the browser. An attacker could control the response and craft attacks such as cross-site scripting and cache poisoning attacks.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-05 15:41 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Rejetto | Http File Server |
Affected:
2.2a, build #124
|
|
| rejetto | http_file_server |
Affected:
2.2a
cpe:2.3:a:rejetto:http_file_server:2.2a:*:*:*:*:*:*:* |
Date Public
2024-02-05 14:58
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CVE-2023-49082 (GCVE-0-2023-49082)
Vulnerability from cvelistv5 – Published: 2023-11-29 20:07 – Updated: 2026-06-23 17:19
VLAI
EPSS
VEX
Title
aiohttp's ClientSession is vulnerable to CRLF injection via method
Summary
aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Improper validation makes it possible for an attacker to modify the HTTP request (e.g. insert a new header) or even create a new HTTP request if the attacker controls the HTTP method. The vulnerability occurs only if the attacker can control the HTTP method (GET, POST etc.) of the request. If the attacker can control the HTTP version of the request it will be able to modify the request (request smuggling). This issue has been patched in version 3.9.0.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-06-03 15:13 UTC
CWE
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/aio-libs/aiohttp/security/advi… | x_refsource_CONFIRM |
| https://github.com/aio-libs/aiohttp/pull/7806/files | x_refsource_MISC |
| https://github.com/aio-libs/aiohttp/commit/e4ae01… | x_refsource_MISC |
| https://gist.github.com/jnovikov/7f411ae9fe6a9a78… | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2025… | |
| https://lists.fedoraproject.org/archives/list/pac… |
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CVE-2023-34472 (GCVE-0-2023-34472)
Vulnerability from cvelistv5 – Published: 2023-07-05 18:08 – Updated: 2024-10-28 17:43
VLAI
EPSS
VEX
Summary
AMI SPx contains a vulnerability in the BMC where an Attacker may cause an improper neutralization of CRLF sequences in HTTP Headers. A successful exploit of this vulnerability may lead to a loss of integrity.
Severity
5.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-28 17:42 UTC
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AMI | MegaRAC_SPx |
Affected:
12.0 , < 12.7
(RC)
Affected: 13.0 , < 13.5 (RC) |
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CVE-2023-23936 (GCVE-0-2023-23936)
Vulnerability from cvelistv5 – Published: 2023-02-16 17:30 – Updated: 2025-03-10 21:10
VLAI
EPSS
VEX
Title
CRLF Injection in Nodejs ‘undici’ via host
Summary
Undici is an HTTP/1.1 client for Node.js. Starting with version 2.0.0 and prior to version 5.19.1, the undici library does not protect `host` HTTP header from CRLF injection vulnerabilities. This issue is patched in Undici v5.19.1. As a workaround, sanitize the `headers.host` string before passing to undici.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-10 21:01 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/nodejs/undici/security/advisor… | x_refsource_CONFIRM |
| https://github.com/nodejs/undici/commit/a2eff0540… | x_refsource_MISC |
| https://hackerone.com/reports/1820955 | x_refsource_MISC |
| https://github.com/nodejs/undici/releases/tag/v5.19.1 | x_refsource_MISC |
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CVE-2023-4768 (GCVE-0-2023-4768)
Vulnerability from cvelistv5 – Published: 2023-11-03 10:42 – Updated: 2024-09-05 13:59
VLAI
EPSS
VEX
Title
Improper Neutralization of CRLF Sequences in ManageEngine Desktop Central
Summary
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Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-05 13:52 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ManageEngine | Desktop Central |
Affected:
9.1.0
|
Date Public
2023-11-03 11:00
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CVE-2023-4767 (GCVE-0-2023-4767)
Vulnerability from cvelistv5 – Published: 2023-11-03 10:41 – Updated: 2024-09-05 13:59
VLAI
EPSS
VEX
Title
Improper Neutralization of CRLF Sequences in ManageEngine Desktop Central
Summary
A CRLF injection vulnerability has been found in ManageEngine Desktop Central affecting version 9.1.0. This vulnerability could allow a remote attacker to inject arbitrary HTTP headers and perform HTTP response splitting attacks via the fileName parameter in /STATE_ID/1613157927228/InvSWMetering.csv.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-05 13:52 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ManageEngine | Desktop Central |
Affected:
9.1.0
|
Date Public
2023-11-03 11:00
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CVE-2023-0040 (GCVE-0-2023-0040)
Vulnerability from cvelistv5 – Published: 2023-01-18 00:00 – Updated: 2025-04-03 19:28
VLAI
EPSS
VEX
Summary
Versions of Async HTTP Client prior to 1.13.2 are vulnerable to a form of targeted request manipulation called CRLF injection. This vulnerability was the result of insufficient validation of HTTP header field values before sending them to the network. Users are vulnerable if they pass untrusted data into HTTP header field values without prior sanitisation. Common use-cases here might be to place usernames from a database into HTTP header fields. This vulnerability allows attackers to inject new HTTP header fields, or entirely new requests, into the data stream. This can cause requests to be understood very differently by the remote server than was intended. In general, this is unlikely to result in data disclosure, but it can result in a number of logical errors and other misbehaviours.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-02 17:47 UTC
CWE
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Swift Project | Async HTTP Client |
Affected:
unspecified , ≤ 1.13.1
(custom)
|
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Mitigation
Implementation
Avoid using CRLF as a special sequence.
Mitigation
Implementation
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.