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6 vulnerabilities by warmcat
CVE-2026-10650 (GCVE-0-2026-10650)
Vulnerability from cvelistv5 – Published: 2026-06-02 21:15 – Updated: 2026-06-03 14:04 X_Open Source
VLAI
Title
warmcat libwebsockets SSH Protocol sshd.c lws_ssh_parse_plaintext resource consumption
Summary
A flaw has been found in warmcat libwebsockets up to 4.5.8. This issue affects the function lws_ssh_parse_plaintext of the file plugins/protocol_lws_ssh_base/sshd.c of the component SSH Protocol Handler. Executing a manipulation of the argument msg_len can lead to resource consumption. The attack may be launched remotely. The exploit has been published and may be used. This patch is called 3f9f0c6ecaf0e6f3f219d30632c5d1f2479d7498. A patch should be applied to remediate this issue.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/367955 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/367955/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-10650 | third-party-advisory |
| https://vuldb.com/submit/830261 | third-party-advisory |
| https://github.com/biniamf/pocs/tree/main/libwebs… | exploit |
| https://github.com/biniamf/pocs/blob/main/libwebs… | exploit |
| https://github.com/warmcat/libwebsockets/commit/3… | patch |
| https://github.com/warmcat/libwebsockets/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| warmcat | libwebsockets |
Affected:
4.5.0
Affected: 4.5.1 Affected: 4.5.2 Affected: 4.5.3 Affected: 4.5.4 Affected: 4.5.5 Affected: 4.5.6 Affected: 4.5.7 Affected: 4.5.8 cpe:2.3:a:warmcat:libwebsockets:*:*:*:*:*:*:*:* |
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CVE-2025-11680 (GCVE-0-2025-11680)
Vulnerability from cvelistv5 – Published: 2025-10-20 14:04 – Updated: 2025-10-20 14:34
VLAI
Title
Out-of-bounds Write in libwebsockets PNG parsing
Summary
Out-of-bounds Write in unfilter_scanline in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to write past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big width value that causes an integer overflow which value is used for determining the size of a heap allocation.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://libwebsockets.org/git/libwebsockets/commi… | patchvendor-advisory |
| https://www.nozominetworks.com/labs/vulnerability… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| warmcat | libwebsockets |
Affected:
4.0 , ≤ 4.4.2
(semver)
Affected: 4.0 , ≤ 4.3.6 (semver) |
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CVE-2025-11679 (GCVE-0-2025-11679)
Vulnerability from cvelistv5 – Published: 2025-10-20 13:58 – Updated: 2025-10-20 14:03
VLAI
Title
Out-of-bounds Read in libwebsockets PNG parsing
Summary
Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big height dimension.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://libwebsockets.org/git/libwebsockets/commi… | patchvendor-advisory |
| https://www.nozominetworks.com/labs/vulnerability… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| warmcat | libwebsockets |
Affected:
4.0 , ≤ 4.4.2
(semver)
Affected: 4.0 , ≤ 4.3.6 (semver) |
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CVE-2025-11678 (GCVE-0-2025-11678)
Vulnerability from cvelistv5 – Published: 2025-10-20 13:51 – Updated: 2025-10-20 14:00
VLAI
Title
Stack-based Buffer Overflow in libwebsockets DNS response parsing
Summary
Stack-based Buffer Overflow in lws_adns_parse_label in warmcat libwebsockets allows, when the LWS_WITH_SYS_ASYNC_DNS flag is enabled during compilation, to overflow the label_stack, when the attacker is able to sniff a DNS request in order to craft a response with a matching id containing a label longer than the maximum.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://libwebsockets.org/git/libwebsockets/commi… | patchvendor-advisory |
| https://www.nozominetworks.com/labs/vulnerability… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| warmcat | libwebsocket |
Affected:
4.0 , ≤ 4.4.2
(semver)
Affected: 4.0 , ≤ 4.3.6 (semver) |
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CVE-2025-11677 (GCVE-0-2025-11677)
Vulnerability from cvelistv5 – Published: 2025-10-20 13:41 – Updated: 2025-10-24 10:54
VLAI
Title
Use After Free in libwebsockets WebSocket server
Summary
Use After Free in WebSocket server implementation in lws_handshake_server in warmcat libwebsockets may allow an attacker, in specific configurations where the user provides a callback function that handles LWS_CALLBACK_HTTP_CONFIRM_UPGRADE, to achieve denial of service.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-416 - Use After Free
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://libwebsockets.org/git/libwebsockets/commi… | patchvendor-advisory |
| https://www.nozominetworks.com/labs/vulnerability… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| warmcat | libwebsockets |
Affected:
3 , ≤ 4.4.1,4.3.6
(semver)
|
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CVE-2025-1866 (GCVE-0-2025-1866)
Vulnerability from cvelistv5 – Published: 2025-03-03 08:44 – Updated: 2025-03-03 16:34
VLAI
Title
Undefined Behavior Due to Out-of-Bounds Pointer Arithmetic in libwebsockets
Summary
Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows Pointer Manipulation, potentially leading to out-of-bounds memory access. This issue affects libwebsockets before 4.3.4 and is present in code built specifically for the Win32 platform.
By default, the affected code is not executed unless one of the following conditions is met:
LWS_WITHOUT_EXTENSIONS (default ON) is manually set to OFF in CMake.
LWS_WITH_HTTP_STREAM_COMPRESSION (default OFF) is manually set to ON in CMake.
Despite these conditions, when triggered in affected configurations, this vulnerability may allow attackers to manipulate pointers, potentially leading to memory corruption or unexpected behavior.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/warmcat/libwebsockets/commit/3… | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| warmcat | libwebsockets |
Affected:
0 , < <4.3.4
(git)
|
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