CVE-2020-36049
Resource exhaustion in socket.io-parser
socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.
- Record
CVE-2020-36049- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-770
- Updated
- 2026-11-02
CVE List No score
socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.
- Record
CVE-2020-36049- Updated
- 2026-11-02
EUVDEUVD-2021-1424 No score
socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.
- Record
EUVD-2021-1424- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-xfhh-g9f5-x4m4
Resource exhaustion in socket.io-parser
The socket.io-parser npm package before versions 3.3.2 and 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.
- Record
GHSA-xfhh-g9f5-x4m4- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
OSVAZL-45030
CVE-2020-36049 affecting package js-jquery 3.5.0-4
socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.
- Record
AZL-45030- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-05
OSV
socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.
- Record
CVE-2020-36049- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Show 8 moreShow less
OSVDEBIAN-CVE-2020-36049
socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.
- Record
DEBIAN-CVE-2020-36049- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-xfhh-g9f5-x4m4
Resource exhaustion in socket.io-parser
The socket.io-parser npm package before versions 3.3.2 and 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.
- Record
GHSA-xfhh-g9f5-x4m4- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-36049
socket.io-parser before 3.4.1 allows attackers to cause a denial of service (memory consumption) via a large packet because a concatenation approach is used.
- Record
UBUNTU-CVE-2020-36049- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVCLSA-2026-1772496675 No score
TuxCare security update for socket.io-parser (3 CVEs)
TuxCare rebuilt socket.io-parser to address 3 CVEs. Fixed in 3.2.0-tuxcare.1.
- Record
CLSA-2026-1772496675- Updated
- 2026-11-02
OSVCLSA-2026-1776731787 No score
TuxCare security update for socket.io-parser (3 CVEs)
TuxCare rebuilt socket.io-parser to address 3 CVEs. Fixed in 3.1.3-tuxcare.1.
- Record
CLSA-2026-1776731787- Updated
- 2026-11-02
OSVCLSA-2026-1791899634 No score
TuxCare security update for socket.io-parser (5 CVEs)
TuxCare rebuilt socket.io-parser to address 5 CVEs. Fixed in 2.3.1-tuxcare.1.
- Record
CLSA-2026-1791899634- Updated
- 2026-11-02
OSVCLSA-2026-1792599106 No score
TuxCare security update for socket.io-parser (5 CVEs)
TuxCare rebuilt socket.io-parser to address 5 CVEs. Fixed in 2.2.2-tuxcare.1.
- Record
CLSA-2026-1792599106- Updated
- 2026-11-02
OSVCLSA-2026-1792665531 No score
TuxCare security update for socket.io-parser (5 CVEs)
TuxCare rebuilt socket.io-parser to address 5 CVEs. Fixed in 2.2.4-tuxcare.1.
- Record
CLSA-2026-1792665531- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
socket.io-parsernpm |
before 3.3.2 | 3.3.2 |
socket.io-parsernpm |
3.4.0 to 3.4.0 | 3.4.1 |
js-jqueryAzure Linux:3 |
through 3.5.0-4 | None known |
socket.io-parserTuxCare:npm From an advisory covering 3 CVEs |
3.2.0-tuxcare.0 up to 3.2.0-tuxcare.1, plus listed versions 3.2.0 |
3.2.0-tuxcare.1 |
socket.io-parserTuxCare:npm From an advisory covering 3 CVEs |
3.1.3-tuxcare.0 up to 3.1.3-tuxcare.1, plus listed versions 3.1.3 |
3.1.3-tuxcare.1 |
socket.io-parserTuxCare:npm From an advisory covering 5 CVEs |
2.3.1-tuxcare.0 up to 2.3.1-tuxcare.1, plus listed versions 2.3.1 |
2.3.1-tuxcare.1 |
socket.io-parserTuxCare:npm From an advisory covering 5 CVEs |
2.2.2-tuxcare.0 up to 2.2.2-tuxcare.1, plus listed versions 2.2.2 |
2.2.2-tuxcare.1 |
socket.io-parserTuxCare:npm From an advisory covering 5 CVEs |
2.2.4-tuxcare.0 up to 2.2.4-tuxcare.1, plus listed versions 2.2.4 |
2.2.4-tuxcare.1 |
node-socket.io-parserDebian:12 |
before 3.4.1-1 | 3.4.1-1 |
node-socket.io-parserDebian:13 |
before 3.4.1-1 | 3.4.1-1 |
Show 9 moreShow less
| Package | Affected | Fixed |
|---|---|---|
node-socket.io-parserDebian:14 |
before 3.4.1-1 | 3.4.1-1 |
socket.io-parsernpm |
3.4.0 up to 3.4.1 | 3.4.1 |
node-socket.io-parserUbuntu:18.04:LTS |
All versions, plus listed versions 2.3.1-1 |
None known |
node-socket.io-parserUbuntu:20.04:LTS |
All versions, plus listed versions 3.3.0-13.4.0-1 |
None known |
node-socket.io-parserUbuntu:22.04:LTS |
All versions, plus listed versions 4.0.2-14.1.1+~3.0.0-14.1.2+~3.0.0-1 |
None known |
node-socket.io-parserUbuntu:24.04:LTS |
All versions, plus listed versions 4.2.1+~3.1.0-3 |
None known |
node-socket.io-parserUbuntu:25.10 |
All versions, plus listed versions 4.2.1+~3.1.0-3 |
None known |
node-socket.io-parserUbuntu:26.10 |
All versions, plus listed versions 4.2.1+~3.1.0-44.2.4+~3.1.2-14.2.4+~3.1.2-2 |
None known |
node-socket.io-parserUbuntu:26.04:LTS |
All versions, plus listed versions 4.2.1+~3.1.0-34.2.1+~3.1.0-4 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected | ||
| facts | OSV | |
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-36049 is a high vulnerability (CVSS 7.5) in Socket Socket.io-parser, published January 7, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.67%, the 85th percentile. Fixed in socket.io-parser 3.3.2.
References
blog.caller.xyz/socketio-engineio-dos
github.com/bcaller/kill-engine-io
nvd.nist.gov/vuln/detail/CVE-2020-36049