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.
456 vulnerabilities reference this CWE, most recent first.
CVE-2026-100717 (GCVE-0-2026-100717)
Vulnerability from cvelistv5 – Published: 2026-09-26 13:24 – Updated: 2026-09-30 17:07
VLAI
EPSS
VEX
Title
froxlor before 2.3.12 CRLF Injection via validateUrl userinfo
Summary
froxlor is a server administration panel. In versions 2.3.10 and earlier, Validate::validateUrl rejects carriage return and line feed characters only in the path, query and fragment components returned by parse_url, and never inspects the userinfo (user:pass@) components. This is an incomplete fix for GHSA-c3p2. An authenticated low-privilege customer with subdomain-create rights (no admin or change_serversettings privilege required) can supply a subdomain redirect URL that carries a CR/LF payload in the userinfo portion (e.g. http://user%0areturn 200 "pwned";%0a@evil.com/). The value passes validation, survives IDNA encoding, and is written verbatim into the generated nginx or Apache vhost configuration, allowing the attacker to break out of the emitted directive and inject arbitrary web-server configuration lines. froxlor regenerates and reloads the web-server configuration as root, so the injected directives take effect server-wide and can hijack responses or read local files. The issue is fixed in version 2.3.12.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 17:07 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/froxlor/froxlor/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/froxlor-befo… | third-party-advisory |
Impacted products
Date Public
2026-09-06 00:00
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CVE-2026-94216 (GCVE-0-2026-94216)
Vulnerability from cvelistv5 – Published: 2026-09-21 12:45 – Updated: 2026-10-14 15:43 Unsupported When Assigned
VLAI
EPSS
VEX
Title
ST Engineering iDirect iDX/Evo iDX HTTP Request authorize response splitting
Summary
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 http response splitting. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. The validated environment is an EOL X7 (or an un-modelled legacy Evolution 21.x), and current supported releases (X10, X11, Velocity 5.x+) have no validated evidence of impact. This vulnerability only affects products that are no longer supported by the maintainer.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 15:19 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/408071 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/408071/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-94216 | third-party-advisory |
| https://vuldb.com/submit/894247 | third-party-advisory |
| https://github.com/dxz0069/WAVLINK-WN530H4-Comman… | exploit |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| ST Engineering iDirect | iDX |
Affected:
n/a
cpe:2.3:a:st_engineering_idirect:idx:*:*:*:*:*:*:*:* |
|
| ST Engineering iDirect | Evo iDX |
Affected:
n/a
cpe:2.3:a:st_engineering_idirect:evo_idx:*:*:*:*:*:*:*:* |
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CVE-2026-94057 (GCVE-0-2026-94057)
Vulnerability from cvelistv5 – Published: 2026-09-19 22:55 – Updated: 2026-09-22 15:59
VLAI
EPSS
VEX
Summary
Exim before 4.100.1 allows SMTP smuggling in which the received message does not match any sent message, and instead depends on crafted data sent after a rejection during DATA processing.
Severity
4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 15:59 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
1 reference
Impacted products
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CVE-2026-93576 (GCVE-0-2026-93576)
Vulnerability from cvelistv5 – Published: 2026-09-18 14:33 – Updated: 2026-09-25 08:29
VLAI
EPSS
VEX
Title
Io.netty/netty-codec-smtp: netty netty-codec-smtp — smtp command-name field is not crlf-validated (incomplete fix of cve-2025-59419)
Summary
A flaw was found in Netty netty-codec-smtp. The component does not properly validate Carriage Return (CR) and Line Feed (LF) characters in the SMTP command-name field. A remote attacker, if an application routes untrusted input into this field, can embed CR/LF characters to inject arbitrary SMTP commands. This can lead to SMTP command smuggling, allowing for unauthorized email relay or spoofing of sender/recipient addresses. While the impact is significant, the real-world exploitability is considered lower as applications typically do not place user-controlled data in the command-name field.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 14:58 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-93576 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2536968 | issue-trackingx_refsource_REDHAT |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat build of Apache Camel for Spring Boot 4 |
cpe:/a:redhat:camel_spring_boot:4
|
|
| Red Hat | Red Hat Fuse 7 |
cpe:/a:redhat:jboss_fuse:7
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 |
cpe:/a:redhat:jboss_enterprise_application_platform:7
|
|
| Red Hat | Red Hat Single Sign-On 7 |
cpe:/a:redhat:red_hat_single_sign_on:7
|
Date Public
2026-09-10 00:53
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CVE-2026-91841 (GCVE-0-2026-91841)
Vulnerability from cvelistv5 – Published: 2026-09-25 17:56 – Updated: 2026-09-28 12:43
VLAI
EPSS
VEX
Title
Networkmanager-vpnc: networkmanager-vpnc: incomplete fix for cve-2018-10900 allows root privilege escalation via ca-file path newline injection
Summary
A flaw was found in NetworkManager-vpnc, a VPN plugin for NetworkManager. A local unprivileged user can exploit this vulnerability by injecting a newline character into the CA-File path. This manipulation allows the user to execute arbitrary commands as the root user, leading to local privilege escalation.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-26 03:55 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-91841 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2533651 | issue-trackingx_refsource_REDHAT |
| https://gitlab.gnome.org/Archive/NetworkManager-v… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GNOME | NetworkManager-vpnc |
Affected:
0 , < *
(semver)
|
Date Public
2026-09-15 09:55
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CVE-2026-91840 (GCVE-0-2026-91840)
Vulnerability from cvelistv5 – Published: 2026-09-25 17:56 – Updated: 2026-09-28 12:44
VLAI
EPSS
VEX
Title
Networkmanager-vpnc: networkmanager-vpnc: local privilege escalation to root via newline injection in vpn username
Summary
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Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-26 03:55 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-91840 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2533642 | issue-trackingx_refsource_REDHAT |
| https://gitlab.gnome.org/Archive/NetworkManager-v… |
Impacted products
1 product
| Vendor | Product | Version | |
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| GNOME | NetworkManager-vpnc |
Affected:
0 , < *
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|
Date Public
2026-09-15 09:50
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CVE-2026-91839 (GCVE-0-2026-91839)
Vulnerability from cvelistv5 – Published: 2026-09-25 17:56 – Updated: 2026-09-28 12:44
VLAI
EPSS
VEX
Title
Networkmanager-fortisslvpn: networkmanager-fortisslvpn: local privilege escalation to root via crlf injection in vpn profile credentials
Summary
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Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-26 03:55 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-91839 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2533640 | issue-trackingx_refsource_REDHAT |
| https://gitlab.gnome.org/Archive/NetworkManager-f… |
Impacted products
1 product
| Vendor | Product | Version | |
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| GNOME | NetworkManager-fortisslvpn |
Affected:
0 , < *
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|
Date Public
2026-09-15 09:45
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CVE-2026-90990 (GCVE-0-2026-90990)
Vulnerability from cvelistv5 – Published: 2026-09-22 10:43 – Updated: 2026-09-22 13:04
VLAI
EPSS
VEX
Title
Livestatus injection via monitoring filter values
Summary
Improper neutralization of newlines in filter values in the monitoring host and service list APIs in Checkmk <2.5.0p14 allows an authenticated user to inject additional Livestatus query headers, bypassing object visibility restrictions in count queries to infer information about hosts and services outside their contact groups and occupying web server and Livestatus workers for an attacker-controlled duration.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 13:04 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://checkmk.com/werk/19604 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Checkmk GmbH | Checkmk |
Affected:
2.5.0 , < 2.5.0p14
(semver)
cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:* |
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CVE-2026-90937 (GCVE-0-2026-90937)
Vulnerability from cvelistv5 – Published: 2026-09-14 12:48 – Updated: 2026-09-16 15:01
VLAI
EPSS
VEX
Title
froxlor before 2.2.5 nginx/Apache Configuration Injection via subdomain redirect URL
Summary
froxlor versions before 2.2.5 fail to validate newline characters in subdomain redirect URLs, allowing authenticated customers to inject arbitrary nginx or Apache configuration directives. Attackers can supply URLs containing literal newlines that are written verbatim into vhost config files during cron rebuild, enabling web server configuration corruption, denial of service, or hijacking of HTTP responses across hosted domains.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 15:00 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/froxlor/froxlor/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/froxlor-befo… | third-party-advisory |
Impacted products
Date Public
2026-06-29 00:00
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CVE-2026-90819 (GCVE-0-2026-90819)
Vulnerability from cvelistv5 – Published: 2026-09-14 20:30 – Updated: 2026-09-15 14:25 X_Open Source
VLAI
EPSS
VEX
Title
a2aproject a2a-java Authorization Header Construction BasePushNotificationSender.java BasePushNotificationSender.dispatchNotification response splitting
Summary
A weakness has been identified in a2aproject a2a-java 1.2.0. The affected element is the function BasePushNotificationSender.dispatchNotification of the file server-common/src/main/java/org/a2aproject/sdk/server/tasks/BasePushNotificationSender.java of the component Authorization Header Construction. This manipulation causes http response splitting. The attack can be initiated remotely. Upgrading to version 1.3.0 is sufficient to fix this issue. Patch name: 247a655043f145f6f8e3853724b6a543eaa02001. You should upgrade the affected component.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 14:25 UTC
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/403322 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/403322/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-90819 | third-party-advisory |
| https://vuldb.com/submit/922996 | third-party-advisory |
| https://github.com/a2aproject/a2a-java/pull/1043 | issue-trackingpatch |
| https://github.com/a2aproject/a2a-java/pull/1053 | issue-trackingpatch |
| https://github.com/a2aproject/a2a-java/commit/247… | patch |
| https://github.com/a2aproject/a2a-java/releases/t… | patch |
| https://github.com/a2aproject/a2a-java/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| a2aproject | a2a-java |
Affected:
1.2.0
Unaffected: 1.3.0 cpe:2.3:a:a2aproject:a2a-java:*:*:*:*:*:*:*:* |
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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.