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01 Record

CVE-2025-55184

A pre-authentication denial of service vulnerability exists in 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:

HighPUBLISHEDCNA: Meta
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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02 Description

A pre-authentication denial of service vulnerability exists in 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:

03 Exploitation and scoring

Exploitation
Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
SSVC decision
  • ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
66.61% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 99.2% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-10-07.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2025-12-11 20:05Z10 MO AGO
Last updated
2025-12-15 16:37Z10 MO AGO
Reserved
2025-08-08
Assigning CNA
Meta
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
  • CWE-502Deserialization of Untrusted DataBase
Data version
5.2
Document digest
2306a833a0353e30140fec9424181113f57d5496632c1e1125dd67f9aa8c1800

05 Affected products

VendorProductVersionsPlatforms
Metareact-server-dom-webpack19.0.0 to 19.0.1, 19.1.0 to 19.1.2, 19.2.0 to 19.2.1—
Metareact-server-dom-turbopack19.0.0 to 19.0.1, 19.1.0 to 19.1.2, 19.2.0 to 19.2.1—
Metareact-server-dom-parcel19.0.0 to 19.0.1, 19.1.0 to 19.1.2, 19.2.0 to 19.2.1—

06 References