CVE-2026-35515

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Source
https://cve.org/CVERecord?id=CVE-2026-35515
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35515.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-35515
Aliases
Downstream
Related
Published
2026-04-07T15:06:10.619Z
Modified
2026-07-08T08:05:07.296729705Z
Severity
  • 6.3 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
@nestjs/core Improperly Neutralizes Special Elements in Output Used by a Downstream Component ('Injection')
Details

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 reconnection state. This vulnerability is fixed in 11.1.18.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35515.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-74"
    ]
}
References

Affected packages

Git / github.com/nestjs/nest

Affected ranges

Type
GIT
Repo
https://github.com/nestjs/nest
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
3c1cc5f91e95fcec27c3694cd42a08a50e85cc5f
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ],
    "cpe": "cpe:2.3:a:nestjs:nest:*:*:*:*:*:node.js:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "11.1.18"
        }
    ]
}

Affected versions

6.*
6.3.1
v10.*
v10.0.0
v10.0.1
v10.0.2
v10.0.3
v10.0.4
v10.0.5
v10.1.0
v10.1.1
v10.1.2
v10.1.3
v10.2.0
v10.2.1
v10.2.10
v10.2.2
v10.2.3
v10.2.4
v10.2.5
v10.2.6
v10.2.7
v10.2.8
v10.2.9
v10.3.0
v10.3.1
v10.3.10
v10.3.2
v10.3.3
v10.3.4
v10.3.5
v10.3.6
v10.3.7
v10.3.8
v10.3.9
v10.4.0
v10.4.1
v10.4.10
v10.4.11
v10.4.12
v10.4.13
v10.4.14
v10.4.15
v10.4.2
v10.4.3
v10.4.4
v10.4.5
v10.4.6
v10.4.7
v10.4.8
v10.4.9
v11.*
v11.0.0
v11.0.1
v11.0.10
v11.0.11
v11.0.12
v11.0.13
v11.0.14
v11.0.15
v11.0.16
v11.0.17
v11.0.18
v11.0.19
v11.0.2
v11.0.20
v11.0.21
v11.0.3
v11.0.4
v11.0.5
v11.0.6
v11.0.7
v11.0.8
v11.0.9
v11.1.0
v11.1.1
v11.1.10
v11.1.11
v11.1.12
v11.1.13
v11.1.14
v11.1.15
v11.1.16
v11.1.17
v11.1.2
v11.1.3
v11.1.4
v11.1.5
v11.1.6
v11.1.7
v11.1.8
v11.1.9
v4.*
v4.4.0
v4.4.1
v4.4.2
v4.5.0
v4.5.1
v4.5.10
v4.5.11
v4.5.2
v4.5.3
v4.5.4
v4.5.5
v4.5.6
v4.5.8
v4.5.9
v4.6.1
v4.6.2
v4.6.3
v4.6.4
v4.6.5
v4.6.6
v5.*
v5.0.0
v5.0.0-beta.3
v5.0.0-beta.4
v5.0.0-beta.6
v5.0.0-beta.7
v5.0.0-beta.8
v5.0.0-rc.1
v5.0.0-rc.2
v5.0.0-rc.3
v5.0.0-rc.4
v5.0.1
v5.1.0
v5.2.1
v5.2.2
v5.3.1
v5.3.10
v5.3.11
v5.3.12
v5.3.13
v5.3.14
v5.3.15
v5.3.2
v5.3.3
v5.3.4
v5.3.5
v5.3.6
v5.3.7
v5.3.7-postinstall-next
v5.3.8
v5.3.9
v5.4.0
v5.4.1
v5.5.0
v5.6.0
v5.6.1
v5.6.2
v5.7.1
v5.7.2
v5.7.3
v5.7.4
v6.*
v6.0.0
v6.0.1
v6.0.2
v6.0.3
v6.0.4
v6.0.5
v6.1.0
v6.1.1
v6.10.0
v6.10.1
v6.10.10
v6.10.11
v6.10.12
v6.10.13
v6.10.14
v6.10.2
v6.10.3
v6.10.4
v6.10.5
v6.10.6
v6.10.7
v6.10.8
v6.10.9
v6.11.0
v6.11.1
v6.11.10
v6.11.11
v6.11.2
v6.11.3
v6.11.4
v6.11.5
v6.11.6
v6.11.7
v6.11.8
v6.11.9
v6.2.0
v6.2.1
v6.2.2
v6.2.3
v6.2.4
v6.3.0
v6.3.1
v6.3.2
v6.4.0
v6.4.1
v6.5.0
v6.5.1
v6.5.2
v6.5.3
v6.6.0
v6.6.1
v6.6.2
v6.6.3
v6.6.4
v6.6.5
v6.6.6
v6.6.7
v6.7.0
v6.7.1
v6.7.2
v6.8.0
v6.8.1
v6.8.2
v6.8.3
v6.8.4
v6.8.5
v6.9.0
v7.*
v7.0.0
v7.0.1
v7.0.10
v7.0.11
v7.0.12
v7.0.13
v7.0.2
v7.0.3
v7.0.4
v7.0.5
v7.0.6
v7.0.7
v7.0.8
v7.0.9
v7.1.0
v7.1.1
v7.1.2
v7.1.3
v7.2.0
v7.3.0
v7.3.1
v7.3.2
v7.4.0
v7.4.1
v7.4.2
v7.4.3
v7.4.4
v7.5.0
v7.5.1
v7.5.2
v7.5.3
v7.5.4
v7.5.5
v7.6.0
v7.6.1
v7.6.10
v7.6.11
v7.6.12
v7.6.13
v7.6.14
v7.6.15
v7.6.16
v7.6.17
v7.6.18
v7.6.2
v7.6.3
v7.6.4
v7.6.5
v7.6.6
v7.6.7
v7.6.8
v7.6.9
v8.*
v8.0.0
v8.0.1
v8.0.10
v8.0.11
v8.0.2
v8.0.3
v8.0.4
v8.0.5
v8.0.6
v8.0.7
v8.0.8
v8.0.9
v8.1.0
v8.1.1
v8.1.2
v8.2.0
v8.2.1
v8.2.2
v8.2.3
v8.2.4
v8.2.5
v8.2.6
v8.3.0
v8.3.1
v8.4.0
v8.4.1
v8.4.2
v8.4.3
v8.4.4
v8.4.5
v8.4.6
v8.4.7
v9.*
v9.0.0
v9.0.1
v9.0.10
v9.0.11
v9.0.2
v9.0.3
v9.0.4
v9.0.5
v9.0.6
v9.0.7
v9.0.8
v9.0.9
v9.1.0
v9.1.1
v9.1.2
v9.1.3
v9.1.4
v9.1.5
v9.1.6
v9.2.0
v9.2.1
v9.3.0
v9.3.1
v9.3.10
v9.3.11
v9.3.12
v9.3.2
v9.3.3
v9.3.4
v9.3.5
v9.3.6
v9.3.7
v9.3.8
v9.3.9
v9.4.0
v9.4.1
v9.4.2
v9.4.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35515.json"