(CVE-2026-73477)
Vulnerability from drupal – Published: 2026-08-12 17:56 – Updated: 2026-08-12 17:56 – Source websiteThis module enables you to display content in tabs, where each tab renders a block, a node, a view, or another Quick Tabs instance.
The module did not correctly enforce access when rendering node and block tabs. It treated a neutral access result as a grant for node tabs and block plugins, and performed no access check for reusable custom blocks. Content that should have been denied was therefore rendered — for example, an unpublished node or unpublished reusable custom block could be shown to users without permission to view it.
The access bypass is mitigated by the fact that affected content is selected by a user with the “administer quicktabs” permission when the tab is configured, so an attacker cannot choose which content is exposed.
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"affected_versions": "\u003c4.3.1"
},
"package": {
"ecosystem": "Packagist:https://packages.drupal.org/8",
"name": "drupal/quicktabs"
},
"ranges": [
{
"database_specific": {
"constraint": "\u003c4.3.1"
},
"events": [
{
"introduced": "0"
},
{
"fixed": "4.3.1"
}
],
"type": "ECOSYSTEM"
}
],
"severity": []
}
],
"aliases": [
"CVE-2026-73477"
],
"credits": [
{
"contact": [
"https://www.drupal.org/u/joelpittet"
],
"name": "Jo\u00ebl Pittet (joelpittet)"
}
],
"details": "This module enables you to display content in tabs, where each tab renders a block, a node, a view, or another Quick Tabs instance.\n\nThe module did not correctly enforce access when rendering node and block tabs. It treated a neutral access result as a grant for node tabs and block plugins, and performed no access check for reusable custom blocks. Content that should have been denied was therefore rendered \u2014 for example, an unpublished node or unpublished reusable custom block could be shown to users without permission to view it.\n\nThe access bypass is mitigated by the fact that affected content is selected by a user with the \u201cadminister quicktabs\u201d permission when the tab is configured, so an attacker cannot choose which content is exposed.",
"id": "DRUPAL-CONTRIB-2026-099",
"modified": "2026-08-12T17:56:54.000Z",
"published": "2026-08-12T17:56:54.000Z",
"references": [
{
"type": "WEB",
"url": "https://www.drupal.org/sa-contrib-2026-099"
}
],
"schema_version": "1.7.0"
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.