CVEvulnerability
CVE-2026-44214
5.3 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-05-26
- Last modified
- 2026-07-24
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.8 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weaknesses
- CWE-113, CWE-93
Description
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.
Affected configurations
• rexxars eventsource-encoder (< 1.0.2)
Related
References
- https://github.com/rexxars/eventsource-encoder/security/advisories/GHSA-m9g3-3g99-mhpx Exploit, Mitigation, Vendor Advisory
- https://github.com/rexxars/eventsource-encoder/security/advisories/GHSA-m9g3-3g99-mhpx Exploit, Mitigation, Vendor Advisory