External risk intelligence

Little Birdies Theme Object Injection Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-112859

The vulnerability affects a WordPress theme, which is a component of a web application. WordPress themes are intended to be internet-facing by their nature as part of a public-facing website, making the attack surface commonly reachable via the internet in standard deployments.

Deserialization

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability has been identified in the Little Birdies theme, specifically related to the deserialization of untrusted data. This could allow for unauthorized code execution, potentially impacting the integrity and availability of systems using this theme. The primary concern is to confirm if our environment utilizes this theme and assess any exposure.

Theme flaw allows unauthorized code injection.
Important for confirming potential business exposure.
Verify theme usage and assess risk.

Attack Path

How an attacker could exploit the issue

An attacker can exploit this vulnerability by sending specially crafted data over the network to a vulnerable instance of the Little Birdies theme. This allows them to inject malicious code, potentially leading to unauthorized access and control of the website.

Requires network access.
Triggered by deserializing untrusted data.
Enables code execution and data compromise.

Live Threat

Current exploitation, exposure, and threat context

The "Little Birdies" theme for WordPress could be vulnerable to object injection when processing untrusted data through deserialization, potentially impacting the integrity and availability of the website. This could occur when the theme handles data in a way that allows for the injection of malicious objects.

Website data and integrity.
Untrusted data processing.
Compromised website functionality.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in the Little Birdies theme likely impacts web application owners and infrastructure teams responsible for WordPress deployments. The first practical step is to identify all instances of the Little Birdies theme, determine their exposure, and confirm the accountable owner for remediation planning.

Theme owners should identify affected sites.
Verify theme reachability and business criticality.
Plan remediation based on identified risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

Free EASM Trial See How Signal Works

Frequently asked questions

What is the Little Birdies theme?

Little Birdies is a WordPress theme by ThemeREX Group. WordPress themes are collections of files that dictate the design, layout, and functionality of a website, essentially acting as the visual and structural interface for users visiting a site.

What does CVE-2026-112859 mean by object injection?

This vulnerability involves 'Deserialization of Untrusted Data' (CWE-502). When the theme processes data that has been modified by an outside party, it may inadvertently convert that data into active, executable objects. This allows a remote attacker to force the application to perform unintended actions, effectively injecting their own code into the site's execution flow.

How is this vulnerability triggered?

An attacker triggers this by sending specifically crafted, malicious data to the vulnerable theme over the network. It is important to note that this is not triggered by standard site usage, such as a user simply browsing or clicking buttons on the website; the attack requires the application to attempt to deserialize—or reconstruct—data provided by the attacker.

Is my website at risk from this vulnerability?

According to Halo Surface Signal, this vulnerability affects a WordPress theme, which is typically designed to be internet-facing. Because these components are meant to handle public web traffic, the attack surface is generally reachable from the internet, making it a relevant concern for any organization using the Little Birdies theme in a public-facing capacity.

What should I do first to address this?

The immediate priority is to conduct an inventory to determine if and where the Little Birdies theme is deployed within your environment. Once you have identified all instances, assess the business criticality of those specific sites and coordinate with the accountable technical owners to review available security updates and plan the necessary remediation.

References

patchstack.com/database/wordpress/theme/little-birdies/vulnerability…

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.