CyberSecBulletin

Deserialization of Untrusted Data

CWE-502

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

We track 2,126 vulnerabilities of this type. 100% are rated high or critical, and the average CVSS score is 8.8. 76 have been exploited in real attacks.

How this weakness is prevented

  • Architecture and Design Implementation: If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.
  • Implementation: When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.
  • Implementation: Explicitly define a final object() to prevent deserialization.
  • Architecture and Design Implementation: Make fields transient to protect them from deserialization. An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.
  • Implementation: Avoid having unnecessary types or gadgets (a sequence of instances and method invocations that can self-execute during the deserialization process, often found in libraries) available that can be leveraged for malicious ends. This limits the potential for unintended or unauthorized types and gadgets to be leveraged by the attacker. Add only acceptable classes to an allowlist. Note: new gadgets are constantly being discovered, so this alone is not a sufficient mitigation.

Latest Deserialization of Untrusted Data vulnerabilities

  • 8.1 High severity

    divi-booster: Cross-Site Request Forgery

    CVE-2026-2626Divi-booster

    The divi-booster WordPress plugin before 5.0.2 does not have authorization and CSRF checks in one of its fixing function, allowing unauthenticated users to modify stored divi-booster WordPress plugin before 5.0.2 options. Furthermore, due to the use of unseria

  • 7.8 High severity

    EcoStruxure™ Power Monitoring Expert (PME): Deserialization of Untrusted Data

    CVE-2025-11739Schneider Electric

    CWE‑502: Deserialization of Untrusted Data vulnerability exists that could cause arbitrary code execution with administrative privileges when a locally authenticated attacker sends a crafted data stream, triggering unsafe deserialization.

  • 9.1 Critical severity

    SAP NetWeaver Enterprise Portal Administration: Deserialization of Untrusted Data

    CVE-2026-27685SAP

    SAP NetWeaver Enterprise Portal Administration is vulnerable if a privileged user uploads untrusted or malicious content that, upon deserialization, could result in a high impact on the confidentiality, integrity, and availability of the host system.

  • 7.5 High severity

    JS Archive List: Deserialization of Untrusted Data

    CVE-2026-2020Skatox

    The JS Archive List plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 6.1.7 via the 'included' shortcode attribute. This is due to the deserialization of untrusted input supplied via the 'included' parameter of th

  • 7.2 High severity

    langgraph: Deserialization of Untrusted Data

    CVE-2026-28277LangChain AIEPSS 5.49%

    LangGraph SQLite Checkpoint is an implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via aiosqlite). In version 1.0.9 and prior, LangGraph checkpointers can load msgpack-encoded checkpoints that reconstruct Python objects dur

  • 7.8 High severity

    Avira Internet Security: Deserialization of Untrusted Data

    CVE-2026-27749Gen Digital

    Avira Internet Security contains a deserialization of untrusted data vulnerability in the System Speedup component. The Avira.SystemSpeedup.RealTimeOptimizer.exe process, which runs with SYSTEM privileges, deserializes data from a file located in C:\\ProgramDa

  • 9.8 Critical severity

    Database for Contact Form 7, WPforms…: Deserialization of Untrusted Data

    CVE-2026-2599Crmperks

    The Database for Contact Form 7, WPforms, Elementor forms plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.4.7 via deserialization of untrusted input in the 'download_csv' function. This makes it possible for u

  • 9.8 Critical severity

    Good Energy: Deserialization of Untrusted Data

    CVE-2026-28105ThemeREX

    Deserialization of Untrusted Data vulnerability in ThemeREX Good Energy goodenergy allows Object Injection.This issue affects Good Energy: from n/a through <= 1.7.7.

  • 9.8 Critical severity

    Pizza House: Deserialization of Untrusted Data

    CVE-2026-28074ThemeREX

    Deserialization of Untrusted Data vulnerability in ThemeREX Pizza House pizzahouse allows Object Injection.This issue affects Pizza House: from n/a through <= 1.4.0.

  • 9.8 Critical severity

    Dentario: Deserialization of Untrusted Data

    CVE-2026-27439ThemeREX

    Deserialization of Untrusted Data vulnerability in ThemeREX Dentario dentario allows Object Injection.This issue affects Dentario: from n/a through <= 1.5.

  • 9.8 Critical severity

    Kingler: Deserialization of Untrusted Data

    CVE-2026-27438ThemeREX

    Deserialization of Untrusted Data vulnerability in ThemeREX Kingler kingler allows Object Injection.This issue affects Kingler: from n/a through <= 1.7.

  • 9.8 Critical severity

    Tennis Club: Deserialization of Untrusted Data

    CVE-2026-27437ThemeREX

    Deserialization of Untrusted Data vulnerability in ThemeREX Tennis Club tennis-sportclub allows Object Injection.This issue affects Tennis Club: from n/a through <= 1.2.3.

  • 9.8 Critical severity

    Sweet Date: Deserialization of Untrusted Data

    CVE-2026-27417SeventhQueen

    Deserialization of Untrusted Data vulnerability in SeventhQueen Sweet Date sweetdate allows Object Injection.This issue affects Sweet Date: from n/a through < 4.0.1.

  • 8.8 High severity

    NextScripts: Deserialization of Untrusted Data

    CVE-2026-27379NextScripts

    Deserialization of Untrusted Data vulnerability in NextScripts NextScripts social-networks-auto-poster-facebook-twitter-g allows Object Injection.This issue affects NextScripts: from n/a through <= 4.4.7.

  • 8.1 High severity

    Celeste: Deserialization of Untrusted Data

    CVE-2026-27369BoldThemes

    Deserialization of Untrusted Data vulnerability in BoldThemes Celeste celeste allows Object Injection.This issue affects Celeste: from n/a through <= 1.3.6.

  • 8.8 High severity

    Car Zone: Deserialization of Untrusted Data

    CVE-2026-27338AivahThemes

    Deserialization of Untrusted Data vulnerability in AivahThemes Car Zone carzone allows Object Injection.This issue affects Car Zone: from n/a through <= 3.7.

  • 8.1 High severity

    Au Pair Agency - Babysitting & Nanny Theme: Deserialization of Untrusted Data

    CVE-2026-27098AxiomThemes

    Deserialization of Untrusted Data vulnerability in axiomthemes Au Pair Agency - Babysitting & Nanny Theme au-pair-agency allows Object Injection.This issue affects Au Pair Agency - Babysitting & Nanny Theme: from n/a through <= 1.2.2.

  • 7.5 High severity

    Podlove Web Player: Deserialization of Untrusted Data

    CVE-2026-24385Gerritvanaaken

    Deserialization of Untrusted Data vulnerability in gerritvanaaken Podlove Web Player podlove-web-player allows Object Injection.This issue affects Podlove Web Player: from n/a through <= 5.9.1.

  • 8.8 High severity

    PowerPress Podcasting: Deserialization of Untrusted Data

    CVE-2026-23798Blubrry

    Deserialization of Untrusted Data vulnerability in blubrry PowerPress Podcasting powerpress allows Object Injection.This issue affects PowerPress Podcasting: from n/a through <= 11.15.10.

  • 9.8 Critical severity

    Mounthood: Deserialization of Untrusted Data

    CVE-2026-22501AxiomThemes

    Deserialization of Untrusted Data vulnerability in axiomthemes Mounthood mounthood allows Object Injection.This issue affects Mounthood: from n/a through <= 1.3.2.

  • 9.8 Critical severity

    Jardi: Deserialization of Untrusted Data

    CVE-2026-22497AncoraThemes

    Deserialization of Untrusted Data vulnerability in AncoraThemes Jardi jardi allows Object Injection.This issue affects Jardi: from n/a through <= 1.7.2.

  • 9.8 Critical severity

    Estate: Deserialization of Untrusted Data

    CVE-2026-22475AxiomThemes

    Deserialization of Untrusted Data vulnerability in axiomthemes Estate estate allows Object Injection.This issue affects Estate: from n/a through <= 1.3.4.

  • 9.8 Critical severity

    Equestrian Centre: Deserialization of Untrusted Data

    CVE-2026-22474ThemeREX

    Deserialization of Untrusted Data vulnerability in ThemeREX Equestrian Centre equestrian-centre allows Object Injection.This issue affects Equestrian Centre: from n/a through <= 1.5.

  • 8.8 High severity

    Dental Clinic: Deserialization of Untrusted Data

    CVE-2026-22473DesignThemes

    Deserialization of Untrusted Data vulnerability in designthemes Dental Clinic dental allows Object Injection.This issue affects Dental Clinic: from n/a through <= 3.7.

  • 8.8 High severity

    Secudeal Payments for Ecommerce: Deserialization of Untrusted Data

    CVE-2026-22471Maximsecudeal

    Deserialization of Untrusted Data vulnerability in maximsecudeal Secudeal Payments for Ecommerce secudeal-payments-for-ecommerce allows Object Injection.This issue affects Secudeal Payments for Ecommerce: from n/a through <= 1.1.

  • 9.8 Critical severity

    Solaris: Deserialization of Untrusted Data

    CVE-2026-22454ThemeREX

    Deserialization of Untrusted Data vulnerability in ThemeREX Solaris solaris allows Object Injection.This issue affects Solaris: from n/a through <= 2.5.

  • 9.8 Critical severity

    Pets Club: Deserialization of Untrusted Data

    CVE-2026-22453ThemeREX

    Deserialization of Untrusted Data vulnerability in ThemeREX Pets Club petclub allows Object Injection.This issue affects Pets Club: from n/a through <= 2.3.

  • 9.8 Critical severity

    Handyman: Deserialization of Untrusted Data

    CVE-2026-22451AncoraThemes

    Deserialization of Untrusted Data vulnerability in AncoraThemes Handyman handyman-services allows Object Injection.This issue affects Handyman: from n/a through <= 1.4.7.

  • 9.8 Critical severity

    Grand Wedding: Deserialization of Untrusted Data

    CVE-2026-22417ThemeGoods

    Deserialization of Untrusted Data vulnerability in ThemeGoods Grand Wedding grandwedding allows Object Injection.This issue affects Grand Wedding: from n/a through < 3.1.11.

  • 9.8 Critical severity

    Classter: Deserialization of Untrusted Data

    CVE-2025-54001ThemeREX

    Deserialization of Untrusted Data vulnerability in ThemeREX Classter classter allows Object Injection.This issue affects Classter: from n/a through <= 2.5.

  • 10.0 Critical severity

    Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data Exploited

    CVE-2026-20131CiscoEPSS 44.4%

    A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to execute arbitrary Java code as root&nbsp;on an affected device. This vulnerability is due to inse

  • 7.2 High severity

    Concrete CMS: Deserialization of Untrusted Data

    CVE-2026-3452Concrete CMS

    Concrete CMS below version 9.4.8 is vulnerable to Remote Code Execution by stored PHP object injection into the Express Entry List block via the columns parameter. An authenticated administrator can store attacker-controlled serialized data in block configurat

  • 9.8 Critical severity

    qwik: Deserialization of Untrusted Data

    CVE-2026-27971QwikDevEPSS 5.48%

    Qwik is a performance focused javascript framework. qwik <=1.19.0 is vulnerable to RCE due to an unsafe deserialization vulnerability in the server$ RPC mechanism that allows any unauthenticated user to execute arbitrary code on the server with a single HTTP r

  • 9.8 Critical severity

    chamilo-lms: Deserialization of Untrusted Data

    CVE-2025-52998Chamilo

    Chamilo is a learning management system. Prior to version 1.11.30, in the application, deserialization of data is performed, the data can be spoofed. An attacker can create objects of arbitrary classes, as well as fully control their properties, and thus modif

  • 7.2 High severity

    chamilo-lms: Deserialization of Untrusted Data

    CVE-2024-47886ChamiloEPSS 1.05%

    Chamilo is a learning management system. Chamillo is affected by a post-authentication phar unserialize which leads to a remote code execution (RCE) within versions 1.11.12 to 1.11.26. By abusing multiple supported features from the virtualization plugin vcham

  • 9.8 Critical severity

    U-Office Force: Deserialization of Untrusted Data

    CVE-2026-3422e-Excellence

    U-Office Force developed by e-Excellence has a Insecure Deserialization vulnerability, allowing unauthenticated remote attackers to execute arbitrary code on the server by sending maliciously crafted serialized content.

  • 7.5 High severity

    WP Mail Logging: Deserialization of Untrusted Data

    CVE-2026-2471Smub

    The WP Mail Logging plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.15.0 via deserialization of untrusted input from the email log message field. This is due to the `BaseModel` class constructor calling `maybe

  • 7.5 High severity

    hex_core: Uncontrolled Resource Consumption

    CVE-2026-21619Hexpm

    Uncontrolled Resource Consumption, Deserialization of Untrusted Data vulnerability in hexpm hex_core (hex_api modules), hexpm hex (mix_hex_api modules), erlang rebar3 (r3_hex_api modules) allows Object Injection, Excessive Allocation. This vulnerability is ass

  • 8.8 High severity

    intra-mart Accel Platform: Deserialization of Untrusted Data

    CVE-2026-27776NTT DATA INTRAMART

    IM-LogicDesigner module of intra-mart Accel Platform contains insecure deserialization issue. This can be exploited only when IM-LogicDesigner is deployed on the system. Arbitrary code may be executed when some crafted file is imported by a user with the admin

  • 8.4 High severity

    Flair: Deserialization of Untrusted Data

    CVE-2026-3071Flair

    Deserialization of untrusted data in the LanguageModel class of Flair from versions 0.4.1 to latest are vulnerable to arbitrary code execution when loading a malicious model.