Flawfinder output manipulation via untrusted filenames and source text (CVE-2026-48813) | HOL Guard CVE

Low · CVSS 8.7CVE-2026-48813GHSA-4C3C-R6P8-C863

Flawfinder output manipulation via untrusted filenames and source text

Answer in brief

CVE-2026-48813 records a Low severity (CVSS 8.7) vulnerability in Flawfinder output manipulation via untrusted filenames and source text. The current sources do not mark it as known exploited. The current feed maps david-a-wheeler/flawfinder (generic), flawfinder (pip), flawfinder (pypi). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 11, 2026Updated Sep 9, 2026Source checked Sep 17, 2026First seen by HOL Jun 26, 2026Material review Sep 9, 2026

Upstream Advisory

Key facts

Risk: Low · CVSS 8.7
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps david-a-wheeler/flawfinder (generic), flawfinder (pip), flawfinder (pypi). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
david-a-wheeler/flawfindergeneric	< 2.0.20	Not reported
flawfinderpip	<2.0.20	2.0.20
flawfinderpypi	>=0 <2.0.20	2.0.20

Recommended response

Check inventory. Check lockfiles and deployed manifests for david-a-wheeler/flawfinder, flawfinder, flawfinder.
Review the reported fix. Update flawfinder to 2.0.20; flawfinder to 2.0.20 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 9, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jun 26, 2026

Sources and claim methodology

Upstream source description

Flawfinder is a a static analysis tool for finding vulnerabilities in C/C++ source code. Versions prior to 2.0.20 have an improper input neutralization issue leading to output manipulation, specifically, Terminal/ANSI Escape Sequence Injection and XML Injection. A malicious file whose name contains ANSI escape sequences can end up being included in flawfinder's standard terminal output, with many effects. Untrusted fields (such as filenames, categories, or code context text) were not properly sanitized when generating structured reports. An attacker could exploit this to corrupt CSV formats or inject arbitrary XML attributes into SonarQube outputs via output_sonar(). It impacts those who use flawfinder to evaluate intentionally malicious filenames or file contents. This issue has been fully patched in Version 2.0.20 (released 2026-05-16). There is no configuration-based workaround within older versions of flawfinder. If an immediate upgrade is not possible, users can mitigate the risk by pre-scanning filenames, inspecting raw output, and/or restricting untrusted inputs.

Quoted source text, attributed separately from HOL analysis.