CVE-2023-28103
Prototype pollution in matrix-react-sdk
matrix-react-sdk is a Matrix chat protocol SDK for React Javascript. In certain configurations, data sent by remote servers containing special strings in key locations could cause modifications of the Object.prototype, disrupting matrix-react-sdk functionality, causing denial of service and potentially affecting program logic. This is fixed in matrix-react-sdk 3.69.0 and users are advised to upgrade. There are no known workarounds for this vulnerability. Note this advisory is distinct from GHSA-2x9c-qwgf-94xr which refers to a similar issue.
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
- Low
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Prototype pollution in matrix-react-sdk
matrix-react-sdk is a Matrix chat protocol SDK for React Javascript. In certain configurations, data sent by remote servers containing special strings in key locations could cause modifications of the Object.prototype, disrupting matrix-react-sdk functionality, causing denial of service and potentially affecting program logic. This is fixed in matrix-react-sdk 3.69.0 and users are advised to upgrade. There are no known workarounds for this vulnerability. Note this advisory is distinct from GHSA-2x9c-qwgf-94xr which refers to a similar issue.
- Record
CVE-2023-28103- CVSS 3.1
- 8.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H - Weakness
- CWE-1321
- Updated
- 2026-11-02
EUVDEUVD-2023-0903
matrix-react-sdk is a Matrix chat protocol SDK for React Javascript. In certain configurations, data sent by remote servers containing special strings in key locations could cause modifications of the Object.prototype, disrupting matrix-react-sdk functionality, causing denial of service and potentially affecting program logic. This is fixed in matrix-react-sdk 3.69.0 and users are advised to upgrade. There are no known workarounds for this vulnerability. Note this advisory is distinct from GHSA-2x9c-qwgf-94xr which refers to a similar issue.
- Record
EUVD-2023-0903- CVSS 3.1
- 8.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-6g43-88cp-w5gv
Prototype pollution in matrix-react-sdk
Impact
In certain configurations, data sent by remote servers containing special strings in key locations could cause modifications of the Object.prototype, disrupting matrix-react-sdk functionality, causing denial of service and potentially affecting program logic.
(This is part 2, where CVE-2022-36060 / GHSA-2x9c-qwgf-94xr is part 1. Part 2 covers remaining vectors not covered by part 1, found in a codebase audit scheduled after part 1.)
Patches
This is fixed in matrix-react-sdk 3.69.0
Workarounds
None.
References
- Release blog post
- The advisory GHSA-2x9c-qwgf-94xr (CVE-2022-36060) refers to an initial set of vulnerable locations discovered and patched in matrix-react-sdk 3.53.0. We opted not to disclose that advisory while we performed an audit of the codebase and are now disclosing it jointly with this one.
For more information
If you have any questions or comments about this advisory please email us at security at matrix.org.
- Record
GHSA-6g43-88cp-w5gv- CVSS 3.1
- 8.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H - Weakness
- CWE-1321
- Updated
- 2026-11-02
NVD
matrix-react-sdk is a Matrix chat protocol SDK for React Javascript. In certain configurations, data sent by remote servers containing special strings in key locations could cause modifications of the Object.prototype, disrupting matrix-react-sdk functionality, causing denial of service and potentially affecting program logic. This is fixed in matrix-react-sdk 3.69.0 and users are advised to upgrade. There are no known workarounds for this vulnerability. Note this advisory is distinct from GHSA-2x9c-qwgf-94xr which refers to a similar issue.
- Record
CVE-2023-28103- CVSS 3.1
- 8.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H - Weakness
- CWE-1321
- Updated
- 2026-11-02
OSVALPINE-CVE-2023-28103
matrix-react-sdk is a Matrix chat protocol SDK for React Javascript. In certain configurations, data sent by remote servers containing special strings in key locations could cause modifications of the Object.prototype, disrupting matrix-react-sdk functionality, causing denial of service and potentially affecting program logic. This is fixed in matrix-react-sdk 3.69.0 and users are advised to upgrade. There are no known workarounds for this vulnerability. Note this advisory is distinct from GHSA-2x9c-qwgf-94xr which refers to a similar issue.
- Record
ALPINE-CVE-2023-28103- CVSS 3.1
- 8.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H - Updated
- 2026-11-03
OSV
Prototype pollution in matrix-react-sdk
matrix-react-sdk is a Matrix chat protocol SDK for React Javascript. In certain configurations, data sent by remote servers containing special strings in key locations could cause modifications of the Object.prototype, disrupting matrix-react-sdk functionality, causing denial of service and potentially affecting program logic. This is fixed in matrix-react-sdk 3.69.0 and users are advised to upgrade. There are no known workarounds for this vulnerability. Note this advisory is distinct from GHSA-2x9c-qwgf-94xr which refers to a similar issue.
- Record
CVE-2023-28103- CVSS 3.1
- 8.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H - Weakness
- CWE-1321
- Updated
- 2026-11-02
OSVGHSA-6g43-88cp-w5gv
Prototype pollution in matrix-react-sdk
Impact
In certain configurations, data sent by remote servers containing special strings in key locations could cause modifications of the Object.prototype, disrupting matrix-react-sdk functionality, causing denial of service and potentially affecting program logic.
(This is part 2, where CVE-2022-36060 / GHSA-2x9c-qwgf-94xr is part 1. Part 2 covers remaining vectors not covered by part 1, found in a codebase audit scheduled after part 1.)
Patches
This is fixed in matrix-react-sdk 3.69.0
Workarounds
None.
References
- Release blog post
- The advisory GHSA-2x9c-qwgf-94xr (CVE-2022-36060) refers to an initial set of vulnerable locations discovered and patched in matrix-react-sdk 3.53.0. We opted not to disclose that advisory while we performed an audit of the codebase and are now disclosing it jointly with this one.
For more information
If you have any questions or comments about this advisory please email us at security at matrix.org.
- Record
GHSA-6g43-88cp-w5gv- CVSS 3.1
- 8.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H - Weakness
- CWE-1321
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
matrix-react-sdknpm |
before 3.69.0 | 3.69.0 |
element-webAlpine:v3.18 |
before 1.11.26-r0 | 1.11.26-r0 |
element-webAlpine:v3.19 |
before 1.11.26-r0 | 1.11.26-r0 |
element-webAlpine:v3.20 |
before 1.11.26-r0 | 1.11.26-r0 |
element-webAlpine:v3.21 |
before 1.11.26-r0 | 1.11.26-r0 |
element-webAlpine:v3.22 |
before 1.11.26-r0 | 1.11.26-r0 |
element-webAlpine:v3.23 |
before 1.11.26-r0 | 1.11.26-r0 |
element-webAlpine:v3.24 |
before 1.11.26-r0 | 1.11.26-r0 |
riot-webAlpine:v3.17 |
before 1.11.26-r0 | 1.11.26-r0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | OSV | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-28103 is a high vulnerability (CVSS 8.2) in Matrix-org Matrix-react-sdk, published March 28, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.71%, the 53rd percentile. Fixed in matrix-react-sdk 3.69.0.
References
github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-6g43-88cp-w5gv
matrix.org/blog/2023/03/28/security-releases-matrix-js-sdk-24-0-0-and-matrix-react-sdk-3-69-0
nvd.nist.gov/vuln/detail/CVE-2023-28103
security.alpinelinux.org/vuln/CVE-2023-28103