blog.trailofbits.com/2025/06/17/unexpected-security-footguns-in-gos-parsers

Preview meta tags from the blog.trailofbits.com website.

Linked Hostnames

18

Thumbnail

Search Engine Appearance

Google

https://blog.trailofbits.com/2025/06/17/unexpected-security-footguns-in-gos-parsers

Unexpected security footguns in Go's parsers

File parsers in Go contain unexpected behaviors that can lead to serious security vulnerabilities. This post examines how JSON, XML, and YAML parsers in Go handle edge cases in ways that have repeatedly resulted in high-impact security issues in production systems. We explore three real-world attack scenarios: marshaling/unmarshaling unexpected data, exploiting parser differentials, and leveraging data format confusion. Through examples, we demonstrate how attackers can bypass authentication, circumvent authorization controls, and exfiltrate sensitive data by exploiting these parser behaviors.



Bing

Unexpected security footguns in Go's parsers

https://blog.trailofbits.com/2025/06/17/unexpected-security-footguns-in-gos-parsers

File parsers in Go contain unexpected behaviors that can lead to serious security vulnerabilities. This post examines how JSON, XML, and YAML parsers in Go handle edge cases in ways that have repeatedly resulted in high-impact security issues in production systems. We explore three real-world attack scenarios: marshaling/unmarshaling unexpected data, exploiting parser differentials, and leveraging data format confusion. Through examples, we demonstrate how attackers can bypass authentication, circumvent authorization controls, and exfiltrate sensitive data by exploiting these parser behaviors.



DuckDuckGo

https://blog.trailofbits.com/2025/06/17/unexpected-security-footguns-in-gos-parsers

Unexpected security footguns in Go's parsers

File parsers in Go contain unexpected behaviors that can lead to serious security vulnerabilities. This post examines how JSON, XML, and YAML parsers in Go handle edge cases in ways that have repeatedly resulted in high-impact security issues in production systems. We explore three real-world attack scenarios: marshaling/unmarshaling unexpected data, exploiting parser differentials, and leveraging data format confusion. Through examples, we demonstrate how attackers can bypass authentication, circumvent authorization controls, and exfiltrate sensitive data by exploiting these parser behaviors.

  • General Meta Tags

    7
    • title
      Unexpected security footguns in Go's parsers -The Trail of Bits Blog
    • charset
      UTF-8
    • viewport
      width=device-width,initial-scale=1
    • description
      File parsers in Go contain unexpected behaviors that can lead to serious security vulnerabilities. This post examines how JSON, XML, and YAML parsers in Go handle edge cases in ways that have repeatedly resulted in high-impact security issues in production systems. We explore three real-world attack scenarios: marshaling/unmarshaling unexpected data, exploiting parser differentials, and leveraging data format confusion. Through examples, we demonstrate how attackers can bypass authentication, circumvent authorization controls, and exfiltrate sensitive data by exploiting these parser behaviors.
    • article:section
      posts

  • Open Graph Meta Tags

    7
    • og:url
      https://blog.trailofbits.com/2025/06/17/unexpected-security-footguns-in-gos-parsers/
    • og:site_name
      The Trail of Bits Blog
    • og:title
      Unexpected security footguns in Go's parsers
    • og:description
      File parsers in Go contain unexpected behaviors that can lead to serious security vulnerabilities. This post examines how JSON, XML, and YAML parsers in Go handle edge cases in ways that have repeatedly resulted in high-impact security issues in production systems. We explore three real-world attack scenarios: marshaling/unmarshaling unexpected data, exploiting parser differentials, and leveraging data format confusion. Through examples, we demonstrate how attackers can bypass authentication, circumvent authorization controls, and exfiltrate sensitive data by exploiting these parser behaviors.
    • US country flagog:locale
      en_us

  • Twitter Meta Tags

    4
    • twitter:card
      summary_large_image
    • twitter:image
      https://blog.trailofbits.com/img/Trail-of-Bits-Open-Graph.png
    • twitter:title
      Unexpected security footguns in Go's parsers
    • twitter:description
      File parsers in Go contain unexpected behaviors that can lead to serious security vulnerabilities. This post examines how JSON, XML, and YAML parsers in Go handle edge cases in ways that have repeatedly resulted in high-impact security issues in production systems. We explore three real-world attack scenarios: marshaling/unmarshaling unexpected data, exploiting parser differentials, and leveraging data format confusion. Through examples, we demonstrate how attackers can bypass authentication, circumvent authorization controls, and exfiltrate sensitive data by exploiting these parser behaviors.

  • Item Prop Meta Tags

    7
    • name
      Unexpected security footguns in Go's parsers
    • description
      File parsers in Go contain unexpected behaviors that can lead to serious security vulnerabilities. This post examines how JSON, XML, and YAML parsers in Go handle edge cases in ways that have repeatedly resulted in high-impact security issues in production systems. We explore three real-world attack scenarios: marshaling/unmarshaling unexpected data, exploiting parser differentials, and leveraging data format confusion. Through examples, we demonstrate how attackers can bypass authentication, circumvent authorization controls, and exfiltrate sensitive data by exploiting these parser behaviors.
    • datePublished
      2025-06-18T07:00:00-04:00
    • dateModified
      2025-06-17T00:00:00-04:00
    • wordCount
      3939

  • Link Tags

    11
    • dns-prefetch
      //fonts.googleapis.com
    • dns-prefetch
      //fonts.gstatic.com
    • preconnect
      https://fonts.gstatic.com
    • preload stylesheet
      /css/syntax.css
    • shortcut icon
      /favicon.png

Links

49