CVE-2026-92973

ansi2html 1.7.0a0 through 1.9.3 Cross-Site Scripting via OSC 8

State: Published
Severity: 5.3 Medium
Published: Sep 17, 2026
Updated: Sep 17, 2026
Reserved: Sep 17, 2026

Description

ansi2html versions 1.7.0a0 through 1.9.3 contain a cross-site scripting vulnerability in OSC 8 hyperlink handling that fails to validate or escape URL targets. Attackers controlling ANSI text input can inject javascript: schemes or terminate href attributes to execute arbitrary scripts in the context of pages displaying converted output.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N	VulnCheck
3.1	6.1 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	VulnCheck

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
ansi2htmlpycontribs	1.7.0a0 to before 1.9.4Affected

References

Patch Commitpatch
https://github.com/pycontribs/ansi2html/blob/v1.9.3/src/ansi2html/converter.py#L345-L349technical-description
https://github.com/pycontribs/ansi2htmlproduct
VulnCheck Advisory: ansi2html 1.7.0a0 through 1.9.3 Cross-Site Scripting via OSC 8third-party-advisory

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