“Sorry, I can’t help with that”: How your guardrails might become the attacker’s best friend

Welcome to this week's edition of the Threat Source newsletter. Hello, everyone. Long time reader, first time writer here at the Threat Source newsletter! I wanted to start out by introducing myself. My colleague and friend Mick Baccio set the bar pretty high last week, so I was planning to tell...

EUVD-2026-67175

The GraphiQL page bundled with Spring for GraphQL loads JavaScript libraries from a public CDN, without Subresource Integrity checks. An attacker can inject malicious code in those scripts and execute arbitrary code on the browser loading the GraphiQL page. Spring for GraphQL 2.0.0 - 2.0.4 Spring...

CVE-2026-59286 Spring for GraphQL loads Untrusted Resources in GraphiQL support

The GraphiQL page bundled with Spring for GraphQL loads JavaScript libraries from a public CDN, without Subresource Integrity checks. An attacker can inject malicious code in those scripts and execute arbitrary code on the browser loading the GraphiQL page. Spring for GraphQL 2.0.0 - 2.0.4 Spring...

CVE-2026-59286 Spring for GraphQL loads Untrusted Resources in GraphiQL support

The GraphiQL page bundled with Spring for GraphQL loads JavaScript libraries from a public CDN, without Subresource Integrity checks. An attacker can inject malicious code in those scripts and execute arbitrary code on the browser loading the GraphiQL page. Spring for GraphQL 2.0.0 - 2.0.4 Spring...

CVE-2026-59286

Spring for GraphQL (versions 2.0.0–2.0.4, 1.4.0–1.4.6, 1.1.0–1.3.9, and 1.0.0–1.0.7) is affected by an unsafe dependency resolution issue in its bundled GraphiQL page, which loads JavaScript libraries from a public CDN without Subresource Integrity checks. An attacker who compromises the CDN or i...

CVE-2026-59283 Spring Framework Safety Guard Bypass via SpEL Expression Compilation

Applications that evaluate Spring Expression Language SpEL expressions using SimpleEvaluationContext may be vulnerable to a safety guard bypass when the SpEL expression compiler is active. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19 Spring Framework 6.1.0 - 6.1.28 Spring...

EUVD-2026-67172

Applications that evaluate Spring Expression Language SpEL expressions using SimpleEvaluationContext may be vulnerable to a safety guard bypass when the SpEL expression compiler is active. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19 Spring Framework 6.1.0 - 6.1.28 Spring...

CVE-2026-59283

Spring Framework 's spring-expression package is vulnerable to a safety guard bypass in SimpleEvaluationContext when the SpEL expression compiler is active. The vulnerability is only exploitable if the application evaluates SpEL expressions via SimpleEvaluationContext and the compiler is enabled ...

CVE-2026-59283

Applications that evaluate Spring Expression Language SpEL expressions using SimpleEvaluationContext may be vulnerable to a safety guard bypass when the SpEL expression compiler is active. Spring Framework 7.0.0 - 7.0.8 Spring Framework 6.2.0 - 6.2.19 Spring Framework 6.1.0 - 6.1.28 Spring...

CVE-2026-59281 Spring Framework Cross-site Scripting via EscapedErrors

Spring MVC and WebFlux applications that obtain a data-binding Errors instance with HTML escaping enabled and then render field errors using the no-argument Errors.getFieldErrors or Errors.getFieldError accessors are vulnerable to arbitrary HTML/JavaScript code injection, potentially resulting in...

CVE-2026-59281

Spring Framework versions 5.2.25.RELEASE and earlier through 7.0.8 are affected by a reflected cross-site scripting (XSS) vulnerability in Spring MVC and WebFlux. The root cause is that the no-argument Errors.getFieldErrors() and Errors.getFieldError() accessors return unescaped field error conte...

CVE-2026-59281 Spring Framework Cross-site Scripting via EscapedErrors

Spring MVC and WebFlux applications that obtain a data-binding Errors instance with HTML escaping enabled and then render field errors using the no-argument Errors.getFieldErrors or Errors.getFieldError accessors are vulnerable to arbitrary HTML/JavaScript code injection, potentially resulting in...

EUVD-2026-67170

Spring MVC and WebFlux applications that obtain a data-binding Errors instance with HTML escaping enabled and then render field errors using the no-argument Errors.getFieldErrors or Errors.getFieldError accessors are vulnerable to arbitrary HTML/JavaScript code injection, potentially resulting in...

CVE-2026-59281

Spring MVC and WebFlux applications that obtain a data-binding Errors instance with HTML escaping enabled and then render field errors using the no-argument Errors.getFieldErrors or Errors.getFieldError accessors are vulnerable to arbitrary HTML/JavaScript code injection, potentially resulting in...

CVE-2026-76220

A flaw was found in GitPython. A remote attacker can bypass the checkunsafeoptions guard by combining a single-character keyword argument with splitsinglecharoptions=False. This allows the attacker to supply a crafted dictionary of keyword arguments to guarded methods, such as clonefrom, leading ...

Security Bulletin: Multiple vulnerabilities in IBM Observability with Instana (OnPrem)

Summary Multiple vulnerabilities were addressed in IBM Observability with Instana OnPrem build 1.0.323 Vulnerability Details CVEID:CVE-2026-48776 DESCRIPTION: LangGraph Python SDK is used to connect to running LangGraph API servers, manage assistants, threads and stream runs from Python...

CVE-2026-4398 Authorization Bypass Through User-Controlled Key in GitLab

GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, an authenticated user could have assigned compliance frameworks from namespaces they were not authorized to access to their own...

CVE-2026-4398 Authorization Bypass Through User-Controlled Key in GitLab

GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, an authenticated user could have assigned compliance frameworks from namespaces they were not authorized to access to their own...

PCI DSS 4.0.1: Application Requirements You’re Being Assessed On in 2026

Key Takeaways Since March 31, 2025, all 51 former “best practice” requirements in PCI DSS 4.0 have been fully scored. Every 2026 assessment covers them. A large share of the new weight sits in the PCI DSS 4.0.1 application requirements , concentrated in Requirements 6 and 11: inventory of custom...

Wordfence Argus Finds Critical Authentication Bypass in WPMU DEV Dashboard Plugin

On August 19th, 2026, during internal research, I discovered an Authentication Bypass vulnerability in WPMU DEV Dashboard, a WordPress plugin with an estimated 350,000 active installations. This vulnerability makes it possible for unauthenticated attackers to gain administrator access when Hub...