Low severity · published Aug 26, 2026
CVE-2026-47844
Reactor Netty HTTP Server Leaks Exception Details
3.7
CVSS
0.2%
EPSS
No
On KEV
Description
In specific scenarios, the Reactor Netty HTTP Server may leak exception details across unrelated requests. In order for this to happen, the server must be configured with Brave Tracing.
Reactor Netty 1.3.0 - 1.3.6
Reactor Netty 1.1.0 - 1.2.18
Reactor Netty 1.0.52 and earlier
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RN
Reactor Netty · Spring
1.3.0 through 1.3.6; 1.1.0 through 1.2.18; through 1.0.52 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47844
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-47844
Vendor Advisory
https://spring.io/security/cve-2026-47844
More from Reactor Netty
6.1
CVE-2026-47848
Reactor Netty WebSocket Client Leaks Credentials On Redirect
6.1
CVE-2026-41715
Reactor Netty HTTP Client Leaks Credentials On Protocol Downgrade Redirect
5.3
CVE-2026-47874
Reactor Netty HTTP Server Denial of Service With Pipelined Requests
5.3
CVE-2026-47845
Reactor Netty HTTP Server may incorrectly evaluate proxy addresses
3.7
CVE-2026-47843
Reactor Netty may incorrectly route traffic due to DNS resolver reuse