How severe is CVE-2025-67779?

CVE-2025-67779 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-67779 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 19% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-67779?

CVE-2025-67779 primarily affects Facebook React. In total, 85 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-67779?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-67779 have an EU (EUVD) identifier?

Yes. CVE-2025-67779 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-202926.

When was CVE-2025-67779 published?

CVE-2025-67779 was published on 2025-12-12 and last updated on 2026-06-17.

CVE-2025-67779

CVE-2025-67779 is a high-severity vulnerability in Facebook React with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 19% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-502.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 19% (97th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-202926
Weakness: CWE-502
Affected product: Facebook React
Published: 2025-12-12
Last modified: 2026-06-17

Description

It was found that the fix addressing CVE-2025-55184 in React Server Components was incomplete and does not prevent a denial of service attack in a specific case. React Server Components versions 19.0.2, 19.1.3 and 19.2.2 are affected, allowing unsafe deserialization of payloads from HTTP requests to Server Function endpoints. This can cause an infinite loop that hangs the server process and may prevent future HTTP requests from being served.

Frequently asked questions

What is CVE-2025-67779?: It was found that the fix addressing CVE-2025-55184 in React Server Components was incomplete and does not prevent a denial of service attack in a specific case. React Server Components versions 19.0.2, 19.1.3 and 19.2.2 are affected, allowing unsafe deserialization of payloads from HTTP requests to Server Function endpoints. This can cause an infinite loop that hangs the server process and may prevent future HTTP requests from being served.
How severe is CVE-2025-67779?: CVE-2025-67779 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-67779 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 19% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-67779?: CVE-2025-67779 primarily affects Facebook React. In total, 85 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-67779?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-67779 have an EU (EUVD) identifier?: Yes. CVE-2025-67779 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-202926.
When was CVE-2025-67779 published?: CVE-2025-67779 was published on 2025-12-12 and last updated on 2026-06-17.

References

Affected products (85)

cpe:2.3:a:facebook:react:19.0.2:*:*:*:*:*:*:*
cpe:2.3:a:facebook:react:19.1.3:*:*:*:*:*:*:*
cpe:2.3:a:facebook:react:19.2.2:*:*:*:*:*:*:*
cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:-:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary0:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary1:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary10:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary11:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary12:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary13:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary14:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary15:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary16:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary17:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary18:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary19:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary2:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary20:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary21:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary22:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary23:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary24:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary25:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary26:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary27:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary28:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary29:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary3:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary30:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary31:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary32:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary33:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary34:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary35:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary36:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary37:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary38:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary39:*:*:*:node.js:*:*
cpe:2.3:a:vercel:next.js:15.6.0:canary4:*:*:*:node.js:*:*

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