CVE Explorer
CVE-2026-35515
Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.18, SseStream._transform() interpolates message.type and message.id directly into Server-Sent Events text protocol output without sanitizing newline characters (\r, \n). Since the SSE protocol treats both \r and \n as field delimiters and \n\n as event boundaries, an attacker who can influence these fields through upstream data sources can inject arbitrary SSE events, spoof event types, and corrupt reconnec
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"nest","vendor":"nestjs","versions":[{"status":"affected","version":"< 11.1.18"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:90f5abf82f2fa3af11c479373766e90426ff0125768eb549cc1123b799e38abe · sha256:fd470b980c9005ef… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:90f5abf82f2fa3af11c479373766e90426ff0125768eb549cc1123b799e38abe · sha256:fd470b980c9005ef… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-74","description":"CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:90f5abf82f2fa3af11c479373766e90426ff0125768eb549cc1123b799e38abe · sha256:fd470b980c9005ef… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"https://github.com/nestjs/nest/security/advisories/GHSA-36xv-jgw5-4q75","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nestjs/nest/security/advisories/GHSA-36xv-jgw5-4q75"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:90f5abf82f2fa3af11c479373766e90426ff0125768eb549cc1123b799e38abe · sha256:fd470b980c9005ef… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.