uws is a WebSocket server library
Published May 31, 2018
5.9
MEDIUMCVSS 3.0
EPSS 1.34%
Description
uws is a WebSocket server library. By sending a 256mb websocket message to a uws server instance with permessage-deflate enabled, there is a possibility used compression will shrink said 256mb down to less than 16mb of websocket payload which passes the length check of 16mb payload. This data will then inflate up to 256mb and crash the node process by exceeding V8's maximum string size. This affects uws >=0.10.0 <=0.10.8.
Affected products
-
- Version >=0.10.0 <=0.10.8StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| HackerOne | Uws Node Module | n/a |
|
- ≥ 0.10.0 · ≤ 0.10.8
No data.
No Red Hat product state for this CVE.
uws
npm
Introduced 0.10.0 Fixed 0.10.9
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | uws | 0.10.0 | 0.10.9 |
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:M/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.34% (0.01340) | 70.28th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.34% (0.01340) | 67.51th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.33% (0.00334) | 54.14th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.10% (0.00098) | 42.62th | v3 (v2023.03.01) |
| Jun 20, 2024 | 0.10% (0.00098) | 41.17th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.10% (0.00098) | 39.14th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00885) | 26.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
References (5)
- https://github.com/advisories/GHSA-hf5h-hh56-3vrg Advisory
- https://github.com/uWebSockets/uWebSockets/commit/37deefd01f0875e133ea967122e3a5e421b8fcd9 x_refsource_MISCPatchThird Party Advisory
- https://nodesecurity.io/advisories/149 x_refsource_MISCThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-10544
- https://www.npmjs.com/advisories/149
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-hf5h-hh56-3vrg | Advisory | |
| https://github.com/uWebSockets/uWebSockets/commit/37deefd01f0875e133ea967122e3a5e421b8fcd9 | x_refsource_MISCPatchThird Party Advisory | |
| https://nodesecurity.io/advisories/149 | x_refsource_MISCThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-10544 | ||
| https://www.npmjs.com/advisories/149 |
Change history (0)
No recorded changes yet.