SB2026110744 - Multiple vulnerabilities in Oracle Communications Cloud Native Core DBTier

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Main Vulnerability Database SB2026110744

SB2026110744 - Multiple vulnerabilities in Oracle Communications Cloud Native Core DBTier

Published: November 7, 2026

Security Bulletin ID SB2026110744
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 67% Low 33%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Resource exhaustion (CVE-ID: CVE-2026-42587)

CWE-ID: CWE-400 - Resource exhaustion

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 HttpContentDecompressor and DelegatingDecompressorFrameListener when processing compressed HTTP request bodies with Content-Encoding set to br, zstd, or snappy. A remote attacker can send a specially crafted compressed payload to cause a denial of service.

The configured maxAllocation limit is enforced for gzip and deflate, but is silently ignored for brotli, zstd, and snappy. The issue affects both HTTP/1.1 and HTTP/2 handling.


2) Stack-based buffer overflow (CVE-ID: CVE-2025-13151)

CWE-ID: CWE-121 - Stack-based buffer overflow

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 perform a denial of service attack.

The vulnerability exists due to a boundary error within the asn1_expend_octet_string() function. A remote attacker can pass specially crafted certificate to the application, trigger a stack-based buffer overflow and perform a denial of service attack..



3) Out-of-bounds read (CVE-ID: CVE-2026-39892)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to out-of-bounds read in Python buffer-accepting APIs when processing a non-contiguous buffer. A local user can pass a specially crafted non-contiguous buffer to cause a denial of service.

The issue can read past the end of the buffer on Python versions later than 3.11.


Remediation

Install update from vendor's website.

References