libwebsockets MQTT Protocol PUBACK Packet Handling Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of libwebsockets. Authentication is not required to exploit this vulnerabilit...
Product
debian/libwebsockets vulnerabilities
11 published CVES affecting debian/libwebsockets, from public sources (CVE.org, NVD, CISA KEV, FIRST EPSS, OSV).
- Total
- 11
- Critical
- 1
- High
- 4
- Medium
- 5
- Low
- 0
- Unscored
- 1
- CISA KEV
- 0
Latest debian/libwebsockets CVEs
Newest publication first
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HighCVSS 8.1 EPSS 0.84%
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HighCVSS 7.5 EPSS 0.55%
Buffer Overflow vulnerability in libwebsockets main 106d542c allows a remote attacker to cause a denial of service via the LEJP JSON parser
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CVE-2026-95114 libwebsockets: libwebsockets: Denial of Service via out-of-bounds read in LEJP parser
PublishedHighCVSS 7.5 EPSS 0.52%libwebsockets contains an out-of-bounds read vulnerability in the LEJP incremental parser in lib/misc/lejp.c. This allows a remote attacker to cause a denial of service
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CriticalCVSS 9.8
libwebsockets HTTP/2 HPACK Path Header Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of libwebsockets. Authentication is not required to exploit this vulnerability. T...
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CVE-2026-78161 warmcat libwebsockets LECP CBOR Recording lecp.c report_raw_cbor out-of-bounds write
PublishedMediumCVSS 6.9A vulnerability was found in warmcat libwebsockets 4.5.0. Impacted is the function report_raw_cbor of the file lib/misc/lecp.c of the component LECP CBOR Recording. The manipulation results in out-of-bounds write. The attack can be launched remotely. The exploit has been made pub...
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MediumCVSS 6.9
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 consum...
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Unknown
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MediumCVSS 5.9
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 webs...
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MediumCVSS 5.9
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...
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HighCVSS 7.5
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 c...
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MediumCVSS 6.3
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.
Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.