CVE-2026-47874
CVE-2026-47874 is a medium-severity vulnerability in Pivotal Reactor Netty with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- EPSS exploit prediction: 0% (32nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-770
- Affected product: Pivotal Reactor Netty
- Published:
- Last modified:
Description
The vulnerability occurs when a client sends HTTP/1.1 pipelined requests over a single connection, causing the Reactor Netty HTTP server to consume an excessive amount of memory. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52 and earlier
Frequently asked questions
- What is CVE-2026-47874?
- The vulnerability occurs when a client sends HTTP/1.1 pipelined requests over a single connection, causing the Reactor Netty HTTP server to consume an excessive amount of memory. Reactor Netty 1.3.0 - 1.3.6 Reactor Netty 1.1.0 - 1.2.18 Reactor Netty 1.0.52 and earlier
- How severe is CVE-2026-47874?
- CVE-2026-47874 has a CVSS 3.x base score of 5.3, rated medium 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 low.
- Is CVE-2026-47874 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-47874?
- CVE-2026-47874 affects Pivotal Reactor Netty. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-47874?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2026-47874 published?
- CVE-2026-47874 was published on 2026-08-27 and last updated on 2026-09-02.
References
Affected products (1)
- cpe:2.3:a:pivotal:reactor_netty:*:*:*:*:*:*:*:*
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