CVE-2026-33128

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Source
https://cve.org/CVERecord?id=CVE-2026-33128
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33128.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-33128
Aliases
Published
2026-03-20T09:37:07.206Z
Modified
2026-04-10T05:42:37.488712Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N CVSS Calculator
Summary
h3 has a Server-Sent Events Injection via Unsanitized Newlines in Event Stream Fields
Details

H3 is a minimal H(TTP) framework. In versions prior to 1.15.6 and between 2.0.0 through 2.0.1-rc.14, createEventStream is vulnerable to Server-Sent Events (SSE) injection due to missing newline sanitization in formatEventStreamMessage() and formatEventStreamComment(). An attacker who controls any part of an SSE message field (id, event, data, or comment) can inject arbitrary SSE events to connected clients. This issue is fixed in versions 1.15.6 and 2.0.1-rc.15.

Database specific 
{
    "cwe_ids": [
        "CWE-93"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33128.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/h3js/h3

Affected ranges

Type
GIT
Repo
https://github.com/h3js/h3
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
829daf157e5add61d60fb18dfdd9f6885e57a5e3

Affected versions

v0.*
v0.0.1
v0.0.10
v0.0.11
v0.0.12
v0.0.13
v0.0.14
v0.0.15
v0.0.2
v0.0.3
v0.0.4
v0.0.5
v0.0.6
v0.0.7
v0.0.8
v0.0.9
v0.2.0
v0.2.1
v0.2.10
v0.2.11
v0.2.12
v0.2.2
v0.2.3
v0.2.4
v0.2.5
v0.2.6
v0.2.7
v0.2.8
v0.2.9
v0.3.0
v0.3.1
v0.3.2
v0.3.3
v0.3.4
v0.3.5
v0.3.6
v0.3.7
v0.3.8
v0.3.9
v0.4.0
v0.4.1
v0.4.2
v0.5.0
v0.5.1
v0.5.2
v0.5.3
v0.5.4
v0.5.5
v0.5.6
v0.5.7
v0.6.0
v0.7.0
v0.7.1
v0.7.10
v0.7.11
v0.7.12
v0.7.13
v0.7.14
v0.7.15
v0.7.16
v0.7.17
v0.7.18
v0.7.19
v0.7.2
v0.7.20
v0.7.21
v0.7.3
v0.7.4
v0.7.5
v0.7.6
v0.7.7
v0.7.8
v0.7.9
v0.8.0
v0.8.1
v0.8.2
v0.8.3
v0.8.4
v0.8.5
v0.8.6
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.1.0
v1.10.0
v1.10.1
v1.10.2
v1.11.0
v1.11.1
v1.12.0
v1.13.0
v1.13.1
v1.14.0
v1.15.0
v1.15.1
v1.15.2
v1.15.4
v1.15.5
v1.2.0
v1.2.1
v1.3.0
v1.4.0
v1.5.0
v1.6.0
v1.6.1
v1.6.2
v1.6.3
v1.6.4
v1.6.5
v1.6.6
v1.7.0
v1.7.1
v1.8.0
v1.8.0-rc.0
v1.8.0-rc.1
v1.8.0-rc.2
v1.8.0-rc.3
v1.8.1
v1.8.2
v1.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33128.json"