CVE-2025-55182
CriticalExploitedPublic exploitReact Server Components are Vulnerable to RCE
Published Dec 5, 2025 · Updated Oct 10, 2026 · Also known as GHSA-9qr9-h5gf-34mp, GHSA-fv66-9v8q-g76r, React 2 Shell, React2Shell, TR-25-0428, react2shell
Key Facts
Patch immediately- CVE-2025-55182 is a critical-severity vulnerability (CVSS 10.0 v3.1) affecting React (Facebook), Next.js (Vercel), jitsucom-jitsu (chainguard) and 9 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 3, 2025 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 100% probability of exploitation in the next 30 days.
- Fixed versions are available, including jitsucom-jitsu 2.11.0-r9, langfuse-3 3.137.0-r0, langfuse-fips-3 3.138.0-r0.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
10.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
100%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2025-55182 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
A pre-authentication remote code execution vulnerability exists in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Dec 5, 2025 | Dec 12, 2025 | Known |
| Industry KEV feed | Dec 3, 2025 | Dec 12, 2025 | Known |
| CIRCL KEV | Dec 5, 2025 | Dec 12, 2025 | Known |
| ENISA EUVD | Dec 5, 2025 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected Products
91 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ReactFacebook | 19.0.0, 19.1.0, 19.1.1, 19.2.0 | n/a |
| Next.jsVercel | 14.3.0-canary77, 14.3.0-canary78, 14.3.0-canary79, 14.3.0-canary80, 14.3.0-canary81, 14.3.0-canary82, 14.3.0-canary83, 14.3.0-canary84 | 15.0.5 |
| jitsucom-jitsuchainguard | See advisory | 2.11.0-r9 |
| langfuse-3chainguard | See advisory | 3.137.0-r0 |
| langfuse-fips-3chainguard | See advisory | 3.138.0-r0 |
Patched Releases
jitsucom-jitsu
2.11.0-r9
langfuse-3
3.137.0-r0
langfuse-fips-3
3.138.0-r0
next
15.0.5, 15.1.9, 15.2.6, 15.3.6, 15.4.8, 15.5.7, 16.0.7
react-server-dom-parcel
19.0.1, 19.1.2, 19.2.1
react-server-dom-turbopack
19.0.1, 19.1.2, 19.2.1
react-server-dom-webpack
19.0.1, 19.1.2, 19.2.1
trigger-dev
4.5.0-r0
Next.js
15.0.5, 15.1.9, 15.2.6, 15.3.6, 15.4.8, 15.5.7, 16.0.7
Timeline
Added to Industry KEV feed
Dec 3, 2025
Publicly disclosed
Dec 5, 2025
Added to CISA KEV
Dec 5, 2025
Added to CIRCL KEV
Dec 5, 2025
Added to ENISA EUVD
Dec 5, 2025
Last updated
Oct 10, 2026
Weakness Type
- CWE-502 Deserialization of Untrusted Data
References
- advisoryVulnCheck exploitation report
- advisoryGHSA advisory
- advisoryGHSA advisory
- advisoryhttps://github.com/react/react/security/advisories/GHSA-fv66-9v8q-g76r
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2025-55182
FAQ
Common Questions.
A pre-authentication remote code execution vulnerability exists in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack.
Affected: React (Facebook) versions 19.0.0, 19.1.0, 19.1.1, 19.2.0; Next.js (Vercel) versions 14.3.0-canary77, 14.3.0-canary78, 14.3.0-canary79, 14.3.0-canary80, 14.3.0-canary81, 14.3.0-canary82, 14.3.0-canary83, 14.3.0-canary84; jitsucom-jitsu (chainguard), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 3, 2025 and is known to be used in ransomware campaigns.
Yes. It was added on Dec 5, 2025 with a federal remediation due date of Dec 12, 2025.
Public exploit code is available.
Fixed versions are available, including jitsucom-jitsu 2.11.0-r9, langfuse-3 3.137.0-r0, langfuse-fips-3 3.138.0-r0.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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