How severe is CVE-2026-82394?

No CVSS score has been assigned to CVE-2026-82394 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-82394?

CVE-2026-82394 affects the following packages: sulu/sulu (Packagist), sulu/sulu (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2026-82394?

Update sulu/sulu to 2.6.25 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-82394 is resolved across your whole dependency graph.

How do I detect CVE-2026-82394 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for sulu/sulu, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-82394 if there is no patch (or I can't update yet)?

Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Is CVE-2026-82394 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-82394 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-82394?

CVE-2026-82394 has an EPSS (Exploit Prediction Scoring System) score of 0.6%, placing it in the 46th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-82394?

CVE-2026-82394 is classified as CWE-862 (CWE-862), CWE-863 (CWE-863). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2026-82394 published, and has it been updated?

CVE-2026-82394 was published on August 31, 2026 and was last updated on September 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

Not in CISA KEV

CVE-2026-82394 — sulu

Fix: sulu/sulu@44d8844

CVE-2026-82394 is a CWE-862 vulnerability in sulu/sulu. A fix is available for sulu/sulu — see the affected versions and patch details below.

Sulu: Fix authorization bypass when creating preview links

Also known asGHSA-65cv-w493-7vhq

Published

Aug 31, 2026

Updated

Sep 10, 2026

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

Exploitation data as of Oct 16, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-82394.

EPSS Exploitation Probability

via FIRST.org ↗

0.6%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs46th percentile — riskier than 46% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

2 pkgs affected

🐘sulu/sulu🐘sulu/sulu

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Impact

A missing authorization check on the preview link endpoint lets a backend user create a public, unauthenticated preview URL for content they are not allowed to see.

PreviewLinkController (and the underlying PreviewLinkManager::generate() / revoke()) never enforced a permission on the target resource. Any authenticated administration user could call the generate action for any page, article or snippet, including content in a webspace or area they have no VIEW rights on. The endpoint returns a public render URL that resolves the content solely by an opaque token, so the attacker (or anyone they share the link with) can then read the restricted content without authentication.

This affects installations that use Sulu role and webspace permissions to restrict who may see certain content. Exploitation requires an authenticated backend user and the id of the target resource.

Patches

Fixed in 2.6.x and 3.0.x. PreviewLinkManager::generate() and revoke() now resolve the resource's security context and enforce a VIEW permission check before a preview link is created or removed. A user without VIEW access on the resource receives a 403 response and no link is created.

Note on scope: this patch closes the authorization bypass. Two related hardening items from the original report are tracked as a separate follow-up because they require a database migration:

The preview link token is derived from substr(md5(uuid), 0, 12) (about 48 bits of entropy).
Preview links never expire.

Workarounds

If you cannot upgrade immediately:

Restrict backend access so that only trusted users can reach the administration interface.
Apply the fix manually by adding a VIEW permission check (via SecurityCheckerInterface and the resource's security context) inside PreviewLinkManager::generate() and revoke().

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`sulu/sulu`	all versions	2.6.25`composer require sulu/sulu:^2.6.25`
🐘Packagist	`sulu/sulu`	≥ 3.0.0-alpha1&&< 3.0.8	3.0.8`composer require sulu/sulu:^3.0.8`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for sulu/sulu, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update sulu/sulu to 2.6.25 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-82394 is resolved across your whole dependency graph.
Workarounds
Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

### Impact A missing authorization check on the preview link endpoint lets a backend user create a public, unauthenticated preview URL for content they are not allowed to see. `PreviewLinkController` (and the underlying `PreviewLinkManager::generate()` / `revoke()`) never enforced a permission on the target resource. Any authenticated administration user could call the generate action for any page, article or snippet, including content in a webspace or area they have no VIEW rights on. The endpoint returns a public render URL that resolves the content solely by an opaque token, so the attack

O3 Security · Impact-Aware SCA

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