CVE-2016-9909
medium
CVSS v3
6.1
CVSS v4 NEW
—
VIR risk
6.1
Description
The serializer in html5lib before 0.99999999 might allow remote attackers to conduct cross-site scripting (XSS) attacks by leveraging mishandling of the < (less than) character in attribute values.
Predictions
Exploit likelihood
71%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 0.999999999-1 |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 0.999999999-1 |
| sid | Fixed | 0.999999999-1 |
| forky | Fixed | 0.999999999-1 |
| bullseye | Fixed | 0.999999999-1 |
| bookworm | Fixed | 0.999999999-1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| html5lib | html5lib | {"endIncluding":"0.99999999"} | |
References
- https://security.archlinux.org/ASA-201612-13
- http://www.openwall.com/lists/oss-security/2016/12/06/5
- http://www.openwall.com/lists/oss-security/2016/12/08/8
- http://www.securityfocus.com/bid/95132
- https://github.com/html5lib/html5lib-python/commit/9b8d8eb5afbc066b7fac9390f5ec75e5e8a7cab7
- https://github.com/html5lib/html5lib-python/issues/11
- https://github.com/html5lib/html5lib-python/issues/12
- https://html5lib.readthedocs.io/en/latest/changes.html#b9
- https://www.suse.com/security/cve/CVE-2016-9909.html
- https://nvd.nist.gov/vuln/detail/CVE-2016-9909
- https://github.com/advisories/GHSA-v9v9-xffq-rwr4
- https://github.com/html5lib/html5lib-python
- https://github.com/pypa/advisory-database/tree/main/vulns/html5lib/PYSEC-2017-14.yaml
- https://web.archive.org/web/20161229134056/http://www.securityfocus.com/bid/95132
- https://security-tracker.debian.org/tracker/CVE-2016-9909
CWEs
CWE-79
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.