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PatchSiren cyber security CVE debrief

CVE-2026-75432 jbeder CVE debrief

CVE-2026-75432 is a medium-severity vulnerability in yaml-cpp 0.9.0, affecting the src/scanner.cpp component, specifically in the Scanner::PopIndent() and Scanner::PushIndentTo() functions. This issue allows remote attackers to obtain sensitive information. The vulnerability has been assessed as medium severity with a CVSS score of 5.1. Developers and administrators using yaml-cpp 0.9.0 should assess their exposure and consider updating to a version without this issue. The CVE record was published on 2026-09-22T20:17:05.377Z.

Vendor
jbeder
Product
yaml-cpp
CVSS
MEDIUM 5.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-22
Original CVE updated
2026-10-03
Advisory published
2026-09-22
Advisory updated
2026-10-03

Who should care

Developers and administrators using yaml-cpp 0.9.0 in their applications should assess their exposure to this vulnerability and consider updating to a version without this issue

Why it matters

CVE-2026-75432 is a medium-severity vulnerability in yaml-cpp 0.9.0 that allows remote attackers to obtain sensitive information. Defenders should assess their exposure and consider updating to a version without this vulnerability.

  • Obtain sensitive information via src/scanner.cpp, Scanner::PopIndent(), and Scanner::PushIndentTo() components requires verification
  • Defenders should verify yaml-cpp 0.9.0 usage and exposure

Technical summary

The yaml-cpp 0.9.0 library has an issue in src/scanner.cpp, specifically in the Scanner::PopIndent() and Scanner::PushIndentTo() components, which allows a remote attacker to obtain sensitive information via these components. This issue has been confirmed by CVE Program and NVD records, indicating that yaml-cpp 0.9.0 is vulnerable to information disclosure. Defenders should assess their exposure and consider updating to a version without this vulnerability.

Defensive priority

Assess yaml-cpp 0.9.0 usage and verify exposure

Recommended defensive actions

  • Assess yaml-cpp 0.9.0 usage in your environment
  • Verify exposure to sensitive information via src/scanner.cpp, Scanner::PopIndent(), and Scanner::PushIndentTo() components
  • Consider updating yaml-cpp to a version without this vulnerability

Evidence notes

CVE Program and NVD records indicate an issue in yaml-cpp 0.9.0 allowing remote attackers to obtain sensitive information via src/scanner.cpp, Scanner::PopIndent(), and Scanner::PushIndentTo() components

Sources and references

Verified primary and authoritative sources

  • CVE-2026-75432 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-75432

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-75432 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-75432

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.