CVE catalog

CVE-2025-6497

tidy-html5: CVE-2025-6497

Severity: Medium
Published: Jun 23, 2025, 1:15:22 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.16% · Oct 25, 2026

A vulnerability was found in HTACG tidy-html5 5.8.0. It has been rated as problematic. This issue affects the function prvTidyParseNamespace of the file src/parser.c. The manipulation leads to reachable assertion. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	tidy-html5	sid	`2:5.8.0-2.1`	vulnerable
Debian	tidy-html5	forky	`2:5.8.0-2.1`	vulnerable
Debian	tidy-html5	trixie	`2:5.8.0-2`	vulnerable
Debian	tidy-html5	bookworm	`2:5.6.0-11`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	tidy-html5	source	sid	`(unfixed)`	not yet assigned	Not reported	[1108234]
Debian	tidy-html5	source	forky	`(unfixed)`	not yet assigned	Not reported	[1108234]
Debian	tidy-html5	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1108234]
Debian	tidy-html5	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1108234]

[Debian bug #1108234]

Notes

[trixie] tidy-html5: Minor issue, revisit when fixed upstream [bookworm] tidy-html5: Minor issue, revisit when fixed upstream

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libtidy5deb1]Affected
Source package: [tidy-html5]
Details (2)
- 2:5.6.0-11 · amd64 · bookworm
  Affected
  dsa · tidy-html5 · debian · bookworm; dsa · tidy-html5 · debian · 12
- 2:5.6.0-11 · arm64 · bookworm
  Affected
  dsa · tidy-html5 · debian · bookworm; dsa · tidy-html5 · debian · 12
[libtidy-dev]Affected
Source package: [tidy-html5]
Details (2)
- 2:5.6.0-11 · amd64 · bookworm
  Affected
  dsa · tidy-html5 · debian · bookworm; dsa · tidy-html5 · debian · 12
- 2:5.6.0-11 · arm64 · bookworm
  Affected
  dsa · tidy-html5 · debian · bookworm; dsa · tidy-html5 · debian · 12
[tidy]Affected
Source package: [tidy-html5]
Details (2)
- 2:5.6.0-11 · amd64 · bookworm
  Affected
  dsa · tidy-html5 · debian · bookworm; dsa · tidy-html5 · debian · 12
- 2:5.6.0-11 · arm64 · bookworm
  Affected
  dsa · tidy-html5 · debian · bookworm; dsa · tidy-html5 · debian · 12

[Debian 13 (Trixie)]

[libtidy58]Affected
Source package: [tidy-html5]
Details (2)
- 2:5.8.0-2 · amd64 · trixie
  Affected
  dsa · tidy-html5 · debian · 13
- 2:5.8.0-2 · arm64 · trixie
  Affected
  dsa · tidy-html5 · debian · 13
[libtidy-dev]Affected
Source package: [tidy-html5]
Details (2)
- 2:5.8.0-2 · amd64 · trixie
  Affected
  dsa · tidy-html5 · debian · 13
- 2:5.8.0-2 · arm64 · trixie
  Affected
  dsa · tidy-html5 · debian · 13
[tidy]Affected
Source package: [tidy-html5]
Details (2)
- 2:5.8.0-2 · amd64 · trixie
  Affected
  dsa · tidy-html5 · debian · 13
- 2:5.8.0-2 · arm64 · trixie
  Affected
  dsa · tidy-html5 · debian · 13

Observed: Oct 24, 2026, 9:37:56 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]