Socket.io is a realtime application framework that provides communication via websockets
Published Jun 4, 2018
7.5
HIGHCVSS 3.0
EPSS 2.00%
Description
Socket.io is a realtime application framework that provides communication via websockets. Because socket.io 0.9.6 and earlier depends on `Math.random()` to create socket IDs, the IDs are predictable. An attacker is able to guess the socket ID and gain access to socket.io servers, potentially obtaining sensitive information.
Affected products
-
- Version <=0.9.6StatusaffectedConstraints-
- 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 | Socket.io Node Module | n/a |
|
No data.
No Red Hat product state for this CVE.
socket.io
npm
Introduced 0 Fixed 0.9.7
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | socket.io | 0 | 0.9.7 |
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:L/PR:N/UI:N/S:U/C:H/I:N/A:N
AV:N/AC:L/Au:N/C:P/I:N/A:N
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
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.00% (0.02000) | 79.99th | v5 (v2026.06.15) |
| Sep 20, 2026 | 2.00% (0.02000) | 79.83th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.18% (0.00180) | 55.60th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.18% (0.00178) | 54.36th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.20% (0.00204) | 56.52th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.10% (0.01105) | 29.18th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.10% (0.01105) | 0.00th | v1 |
References (7)
- https://github.com/advisories/GHSA-qv2v-m59f-v5fw Advisory
- https://github.com/socketio/socket.io/commit/67b4eb9abdf111dfa9be4176d1709374a2b4ded8 x_refsource_MISCIssue TrackingPatchThird Party Advisory
- https://github.com/socketio/socket.io/issues/856 x_refsource_MISCIssue TrackingThird Party Advisory
- https://github.com/socketio/socket.io/pull/857 x_refsource_MISCIssue TrackingThird Party Advisory
- https://nodesecurity.io/advisories/321 x_refsource_MISCThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-16031
- https://www.npmjs.com/advisories/321
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-qv2v-m59f-v5fw | Advisory | |
| https://github.com/socketio/socket.io/commit/67b4eb9abdf111dfa9be4176d1709374a2b4ded8 | x_refsource_MISCIssue TrackingPatchThird Party Advisory | |
| https://github.com/socketio/socket.io/issues/856 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://github.com/socketio/socket.io/pull/857 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://nodesecurity.io/advisories/321 | x_refsource_MISCThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-16031 | ||
| https://www.npmjs.com/advisories/321 |
Change history (0)
No recorded changes yet.