Security readout for executives and security teams
Plain-English summary
Apache Ranger 2.8.0 and earlier contains a URL-parameter flaw that may let a remote attacker gain elevated privileges without authentication or user interaction. Successful exploitation could compromise protected data, policy integrity, and service availability. Apache recommends upgrading to version 2.9.0.
Executive priority
Treat this as an immediate remediation priority for confirmed Ranger 2.8.0-and-earlier deployments. The 9.8 rating and unauthenticated network attack vector imply severe potential impact, although public evidence does not currently confirm exploitation in the wild.
Technical view
The issue is classified as improper input validation, improper privilege management, and improper authentication. Its CVSS 3.1 vector indicates network reachability, low attack complexity, no required privileges, and high confidentiality, integrity, and availability impact. Public details do not identify the vulnerable parameter or affected Ranger component.
Likely exposure
Deployments running Apache Ranger 2.8.0 or earlier are potentially exposed, particularly where the affected service is network-reachable. The source bundle does not specify configuration prerequisites, vulnerable endpoints, or whether particular Ranger components can be excluded.
Exploitation context
The supplied sources do not establish active exploitation, and this CVE is not marked as included in CISA KEV. They also provide no public proof-of-concept details. Absence from KEV does not establish that exploitation has not occurred.
Researcher notes
Technical disclosure is limited: no vulnerable parameter, endpoint, component, prerequisites, or root-cause detail is supplied. The structured affected entry lists version "0" with a default unaffected status, conflicting with the narrative statement covering versions through 2.8.0. Validate scope against Apache’s advisory.
Mitigation direction
- Inventory Apache Ranger deployments and identify instances running version 2.8.0 or earlier.
- Upgrade affected instances to Apache Ranger 2.9.0.
- Review the Apache advisory for deployment-specific guidance before production rollout.
- If upgrading is delayed, use only vendor-approved compensating controls and increase monitoring.
Validation and detection
- Confirm every upgraded instance reports Apache Ranger 2.9.0 or later.
- Repeat vulnerability inventory and investigate any remaining deployments at version 2.8.0 or earlier.
- Review authentication and administrative audit logs for unexplained privilege changes or suspicious parameter activity.
- Use authorized non-production testing to confirm ordinary users cannot obtain elevated privileges through parameter manipulation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-269: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-287: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-40920 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://lists.apache.org/thread/zh92fob9gqp196rvz3x9t0d2fnq9g27dCVE reference, apache · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.