CVE-2025-55183
MediumPublic exploitSource Code Exposure Vulnerability in React Server Components
Published Dec 11, 2025 · Updated Oct 9, 2026 · Also known as GHSA-925w-6v3x-g4j4, GHSA-w37m-7fhw-fmv9
Key Facts
Patch immediately- CVE-2025-55183 is a medium-severity vulnerability (CVSS 5.3 v3.1) affecting React (Facebook), Next.js (Vercel), jitsucom-jitsu (chainguard) and 10 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 64% probability of exploitation in the next 30 days.
- Fixed versions are available, including @seal-security/next 16.0.6-sp999, React 19.0.2, React 19.1.3.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS (30-day exploit likelihood)
64%
Higher than 99.2% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2025-55183 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
An information leak vulnerability exists in specific configurations of React Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and 19.2.1, including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. A specifically crafted HTTP request sent to a vulnerable Server Function may unsafely return the source code of any Server Function. Exploitation requires the existence of a Server Function which explicitly or implicitly exposes a stringified argument.
Affected Products
100 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ReactFacebook | See advisory | 19.0.2 |
| Next.jsVercel | 15.6.0-canary0, 15.6.0-canary10, 15.6.0-canary11, 15.6.0-canary12, 15.6.0-canary13, 15.6.0-canary14, 15.6.0-canary15, 15.6.0-canary16 | 15.0.7 |
| jitsucom-jitsuchainguard | See advisory | 2.11.0-r11 |
| langfuse-3chainguard | See advisory | 3.140.0-r0 |
| langfuse-fips-3chainguard | See advisory | 3.140.0-r0 |
Patched Releases
@seal-security/next
16.0.6-sp999
React
19.0.2, 19.1.3, 19.2.2
jitsucom-jitsu
2.11.0-r11
langfuse-3
3.140.0-r0
langfuse-fips-3
3.140.0-r0
next
15.0.6, 15.1.10, 15.2.7, 15.3.7, 15.4.9, 15.5.8, 15.6.0-canary.59, 16.0.6-sp999, 16.0.9, 16.1.0-canary.17
react-server-dom-parcel
19.0.2, 19.1.3, 19.2.2
react-server-dom-turbopack
19.0.2, 19.1.3, 19.2.2
react-server-dom-webpack
19.0.2, 19.1.3, 19.2.2
trigger-dev
4.5.0-r0
Next.js
15.0.7, 15.1.11, 15.2.8, 15.3.8, 15.4.10, 15.5.9, 16.0.10
Timeline
Publicly disclosed
Dec 11, 2025
Last updated
Oct 9, 2026
Weakness Type
- CWE-497 Exposure of Sensitive System Information to an Unauthorized Control Sphere
- CWE-502 Deserialization of Untrusted Data
- CWE-1395 Dependency on Vulnerable Third-Party Component
References
- advisoryGHSA advisory
- advisoryGHSA advisory
- advisoryhttps://github.com/react/react/security/advisories/GHSA-925w-6v3x-g4j4
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2025-55183
- articlehttps://github.com/facebook/react/security/advisories/GHSA-925w-6v3x-g4j4
FAQ
Common Questions.
An information leak vulnerability exists in specific configurations of React Server Components versions 19.0.0, 19.0.1 19.1.0, 19.1.1, 19.1.2, 19.2.0 and 19.2.1, including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack.
Affected: React (Facebook); Next.js (Vercel) versions 15.6.0-canary0, 15.6.0-canary10, 15.6.0-canary11, 15.6.0-canary12, 15.6.0-canary13, 15.6.0-canary14, 15.6.0-canary15, 15.6.0-canary16; jitsucom-jitsu (chainguard), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including @seal-security/next 16.0.6-sp999, React 19.0.2, React 19.1.3.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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