SB2026052154 - Splunk Enterprise update for third-party components (May 2026)

Description

This security bulletin contains information about 9 vulnerabilities.

1) Uncontrolled recursion (CVE-ID: CVE-2025-68156)

CWE-ID: CWE-674 - Uncontrolled Recursion

CVSSv4: 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/E:U/U:Green

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to uncontrolled recursion within the flatten, min, max, mean, and median function. A remote attacker can pass specially crafted input to the application and perform a denial of service attack. 

2) Input validation error (CVE-ID: CVE-2025-22872)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to perform code injection attacks.

The vulnerability exists due to insufficient validation of tags with unquoted attribute values that end with a solidus character (/). The tokenizer can interpret such tags as self-closing, leading to content following such tags as being placed in the wrong scope during DOM construction.

3) Resource exhaustion (CVE-ID: CVE-2025-47911)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:U/U:Green

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to algorithmic complexity in the html.Parse function when processing specially crafted HTML content. A remote attacker can trigger excessive CPU consumption and perform a denial of service (DoS) attack.

4) Infinite loop (CVE-ID: CVE-2025-58190)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows remote attacker to cause a denial of service.

The vulnerability exists due to an infinite loop in the html.Parse function when processing specially crafted HTML content. A remote attacker can pass malicious input to the application and cause a denial of service.

5) NULL pointer dereference (CVE-ID: CVE-2026-27141)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 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/E:U/U:Green

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to a null pointer dereference in the HTTP/2 handling component when processing HTTP/2 frames. A remote attacker can send specially crafted HTTP/2 frames to cause a denial of service.

6) Improper Certificate Validation (CVE-ID: CVE-2025-68121)

CWE-ID: CWE-295 - Improper Certificate Validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper certificate validation within HTTP/3 connections. A remote attacker can cause cause a client to resume a session with a server that it would not have resumed with during the initial handshake

7) Code Injection (CVE-ID: CVE-2025-61732)

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

CVSSv4: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to inject arbitrary code into the application.

The vulnerability exists due to improper input validation in cmd/cgo caused by discrepancy between how Go and C/C++ comments are parsed. A remote attacker can smuggle code into the resulting cgo binary.

8) Protection mechanism failure (CVE-ID: CVE-2025-61731)

CWE-ID: CWE-693 - Protection Mechanism Failure

CVSSv4: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due CgoPkgConfig allows execution of pkg-config binary with flags that are not explicitly safe-listed. A remote attacker can trick the victim into executing arbitrary commands on the system.

9) Resource exhaustion (CVE-ID: CVE-2025-61726)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: 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/E:U/U:Green

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources within the Request.ParseForm method in net/http when parsing a URL-encoded form. A remote attacker can pass an overly large request with a large number of key-value pairs and consume all available memory on the system. 

Remediation

Install update from vendor's website.

References

• https://advisory.splunk.com/advisories/SVD-2026-0505