CVE-2025-55182
Deserialization of Untrusted Data: Is CVE-2025-55182 real, exploitable, or a false positive? Here's the community verdict.
Community verdict: No field verdicts yet. Be the first practitioner to weigh in.
signals
public sources
Confirmed exploited in the wild. Patch this first, regardless of the base score.
cisa ssvc
CISA Vulnrichment · assessed
CISA decision, by how critical the affected system is to you:
- low impact → Attend
- medium impact → Act
- high impact → Act
Track: normal patch cycle · Track*: watch closely · Attend: patch sooner · Act: patch now. About SSVC ↗
public exploits
links to sources — we don’t host codeA working exploit is publicly available from a maintained source. Treat this as higher urgency and verify your exposure.
affected packages
GHSA-fv66-9v8q-g76r · GitHub rates it critical- npmreact-server-dom-webpack
- Vulnerable
- ≥ 19.0.0, < 19.0.1; ≥ 19.1.0, < 19.1.2; ≥ 19.2.0, < 19.2.1
- Fixed in
- 19.0.1, 19.1.2, 19.2.1
- npmreact-server-dom-turbopack
- Vulnerable
- ≥ 19.0.0, < 19.0.1; ≥ 19.1.0, < 19.1.2; ≥ 19.2.0, < 19.2.1
- Fixed in
- 19.0.1, 19.1.2, 19.2.1
- npmreact-server-dom-parcel
- Vulnerable
- ≥ 19.0.0, < 19.0.1; ≥ 19.1.0, < 19.1.2; ≥ 19.2.0, < 19.2.1
- Fixed in
- 19.0.1, 19.1.2, 19.2.1
Source: GitHub Advisory Database (CC-BY 4.0), via OSV.dev. Check your lockfile version against the ranges above.
baseline read
auto · not a community verdict
Real — exploited in the wild
CISA confirms active exploitation. Treat scanner hits as true positives unless your specific version or config is unaffected.
Based on CISA KEV
Confirm or dispute →CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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.
References
Published · Added to CISA KEV (2 days after publication)
Embed this verdict
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timeline
- CISA SSVC assessment · exploitation: active
- Added to CISA KEV · confirmed exploited in the wild
- Published by NVD
- Added to VulnCheck KEV · reported exploited in the wild
Score and exploit changes tracked since .
Community ground truth
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In your experience, is this finding real and exploitable?
awaiting field verdictsCurated baseline: TruePositive's read from public sources is Real & exploitable — a starting point, not a community verdict.
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Field notes & remediation
Verdicts are the quick signal. Notes are the evidence and fixes behind them.
- 0
Meta React Server Components Remote Code Execution Vulnerability — Meta React Server Components contains a remote code execution vulnerability that could allow unauthenticated remote code execution by exploiting a flaw in how React decodes payloads sent to React Server Function endpoints. Please note CVE-2025-66478 has been rejected, but it is associated with CVE-2025- 55182. Listed in the CISA KEV catalog (added 2025-12-05) — confirmed exploited in the wild, not theoretical. It is linked to known ransomware campaigns. FIRST EPSS puts the chance of exploitation in the next 30 days at ~100%. Treat it as real and prioritize remediation over triage.
Add a field note or remediationoptional
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