CVE-2026-115482
High
Description
In lsquic before 4.9.0, the HTTP/3 implementation can use an excessive amount of memory because the number of buffered header sets is not limited, as demonstrated by a QPACK amplification attack. This is related to header_out_dynamic_entry and es_max_header_list_size.
SeverityHigh
CVSS7.5
Exploit probability—
ProductLitespeedtech Lsquic
PublishedOct 22, 2026
First seenOct 22, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- litespeedtech lsquic4.9.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| litespeedtech lsquic | v < 4.9.0 | 4.9.0 |
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