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Apache Roller CVE-2026-82386

| EUVDEUVD-2026-88130 HIGH
Improper Restriction of XML External Entity Reference (CWE-611)
7.7
CVSS 3.1 · Vendor
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Severity by source

Vendor (CNA) PRIMARY
7.7 HIGH
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
vuln.today AI
7.7 HIGH

Network-reachable import (AV:N/AC:L) requires a weblog-admin account (PR:L, no UI); XXE reads process-readable files and reaches internal hosts beyond the app (S:C, C:H), with no integrity/availability effect.

3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N

Primary rating from Vendor (CNA).

CVSS VectorVendor

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

4
CVSS changed
Sep 28, 2026 - 08:22 NVD
7.7 (HIGH)
Metadata Corrected
Sep 25, 2026 - 22:40 vuln.today
tag: Java added
Analysis Generated
Sep 25, 2026 - 22:17 vuln.today
CVE Published
Sep 25, 2026 - 21:39 oss-security
HIGH

Description PRE-NVD

Disclosed via oss-security. NVD scoring and full description are pending.

AnalysisAI

XML external entity (XXE) processing in Apache Roller 6.1.5 allows an authenticated weblog administrator to read files accessible to the Roller process and to reach internal network addresses by importing a crafted OPML bookmark document, because the bookmark-import parser does not disable external entity resolution. The advisory confirms no non-default configuration is required - the administrator bookmark-import action is vulnerable out of the box on the affected release - which is consistent with the assessed CVSS 3.1 score of 7.7 High (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N, scope changed, confidentiality-only impact). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Requires an authenticated weblog-administrator account (PR:L) that can reach the administrator bookmark-import action; the attacker supplies a crafted OPML document whose external entity/DTD references trigger the vulnerable, non-hardened bookmark import parser. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N, 7.7 High) describes a network-reachable, low-complexity attack requiring an authenticated privileged actor (a weblog administrator, PR:L) and no user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to Apache Roller 6.1.6 or later, which is the vendor-released patch and ships a hardened bookmark-import parser that disables external entity resolution and document type declarations; the change is tracked in https://github.com/apache/roller/pull/173, and upgrade guidance is available from the project at https://roller.apache.org/ and the disclosure at https://seclists.org/oss-sec/2026/q3/951. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory every Apache Roller deployment to identify instances running 6.1.5, confirm the version string against the running artifact rather than documentation, and treat any unpatched internet-facing instance as priority; where a weblog administrator does not require bookmark/OPML import, disable or restrict that function, tighten the roster of accounts holding weblog administrator rights, and review recent OPML import activity and outbound connections from Roller hosts for anomalies. …

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CVE-2026-82386 vulnerability details – vuln.today

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