CVE-2026-86252
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
h3 before 1.15.9 SSE Event Injection via Carriage Return
h3 versions before 1.15.9 fail to sanitize carriage return characters in EventStream data and comment fields, allowing attackers to inject arbitrary SSE events by including unsanitized carriage returns. Attackers can inject event type directives, split single push calls into multiple browser-parsed events, or escape comment fields to inject data, bypassing the prior CVE fix that only addressed newline injection.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
h3
- Vendor
- h3js
- Product
- h3
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 0 | affected | semver | 1.15.9 | Unavailable | None listed |
| 1.15.9 | unaffected | semver | Unavailable | Unavailable | None listed |
| 2.0.0-beta.0 | affected | semver | 2.0.1-rc.17 | Unavailable | None listed |
| 2.0.1-rc.17 | unaffected | semver | Unavailable | Unavailable | None listed |