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    2 vulnerabilities found for eventsource-encoder by rexxars

    CVE-2026-44214 (GCVE-0-2026-44214)

    Vulnerability from nvd – Published: 2026-05-26 19:34 – Updated: 2026-05-27 13:19
    VLAI
    Title
    eventsource-encoder: SSE event injection via unsanitized event and id fields
    Summary
    eventsource-encoder encodes events as well-formed EventSource/Server Sent Event (SSE) messages. Prior to 1.0.2, eventsource-encoder does not sanitize the event or id fields of an EventSourceMessage before serializing them. An attacker who controls either field can inject arbitrary Server-Sent Events line terminators (\n, \r, or \r\n) and thereby forge additional SSE fields or entire messages on the stream. This vulnerability is fixed in 1.0.2.
    Severity
    5.8 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
    SSVC
    Exploitation: poc Automatable: yes 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
    Show details on NVD website
    To clipboard 

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            "url": "https://github.com/rexxars/eventsource-encoder/security/advisories/GHSA-m9g3-3g99-mhpx"
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    CVE-2026-44214 (GCVE-0-2026-44214)

    Vulnerability from cvelistv5 – Published: 2026-05-26 19:34 – Updated: 2026-05-27 13:19
    VLAI
    Title
    eventsource-encoder: SSE event injection via unsanitized event and id fields
    Summary
    eventsource-encoder encodes events as well-formed EventSource/Server Sent Event (SSE) messages. Prior to 1.0.2, eventsource-encoder does not sanitize the event or id fields of an EventSourceMessage before serializing them. An attacker who controls either field can inject arbitrary Server-Sent Events line terminators (\n, \r, or \r\n) and thereby forge additional SSE fields or entire messages on the stream. This vulnerability is fixed in 1.0.2.
    Severity
    5.8 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
    SSVC
    Exploitation: poc Automatable: yes 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
    Show details on NVD website
    To clipboard 

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