SB2026090818 - Multiple vulnerabilities in IBM DevOps Deploy / IBM UrbanCode Deploy (UCD)
Published: September 8, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-59899)
CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in HttpContentEncoder when processing pipelined HTTP/1.1 requests. A remote attacker can send a flood of crafted requests faster than the application produces responses to cause a denial of service.
The issue affects the per-channel acceptEncodingQueue, which accumulates attacker-controlled data on the I/O thread and is drained only when the application writes a non-1xx response.
2) CRLF injection (CVE-ID: CVE-2026-59921)
CWE-ID: CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
CVSSv4: 6.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote user to inject arbitrary MIME headers into multipart request parts.
The vulnerability exists due to improper neutralization of CRLF sequences in io.netty.handler.codec.http.multipart.HttpPostRequestEncoder when constructing multipart HTTP request bodies using user-controlled filenames or field names. A remote user can supply a specially crafted filename or form field name to inject arbitrary MIME headers into multipart request parts.
Exploitation requires application use of the multipart encoder with user-controlled filename or field name data that is forwarded without sanitization.
Remediation
Install update from vendor's website.