Security readout for executives and security teams
Plain-English summary
Apache Ranger through version 2.8.0 contains a critical flaw that may let an unauthenticated remote attacker execute code. Successful exploitation could expose sensitive data, alter security controls, or disrupt Ranger services. Apache recommends upgrading to 2.9.0.
Executive priority
Treat this as an urgent remediation item. Identify Ranger owners immediately, establish whether versions through 2.8.0 are deployed, and accelerate upgrade testing and rollout. Escalate any internet-accessible or broadly reachable instance because the stated impact includes complete data, integrity, and service compromise.
Technical view
CVE-2026-55799 is a CWE-94 code-injection vulnerability in Apache Ranger's GraalScriptEngineCreator. Its CVSS 3.1 score is 9.8: network-accessible, low complexity, no privileges or user interaction required, with high confidentiality, integrity, and availability impact. Public sources provided do not describe the vulnerable execution path or prerequisites.
Likely exposure
Potentially exposed organizations are those running Apache Ranger 2.8.0 or earlier. The supplied sources do not identify affected configurations, reachable endpoints, or whether particular Ranger components must be enabled, so deployment-specific exposure requires confirmation.
Exploitation context
The supplied record does not indicate a CISA KEV listing or provide evidence of active exploitation. The CVSS vector nevertheless describes a remotely reachable, unauthenticated, low-complexity path, making vulnerable deployments attractive targets. No public exploit details are established by this source bundle.
Researcher notes
The bundle's structured affected entry lists version "0" with a default unaffected status, conflicting with the description that Ranger 2.8.0 and earlier are vulnerable. Validate version applicability against Apache's advisory. Sources provide no root-cause detail, affected configuration requirements, indicators of compromise, or confirmed exploitation evidence.
Mitigation direction
- Upgrade affected Apache Ranger installations to version 2.9.0.
- Consult the Apache advisory for deployment-specific precautions and updated guidance.
- Prioritize systems exposed to untrusted networks while completing the upgrade.
Validation and detection
- Inventory Apache Ranger instances and record their exact installed versions.
- Confirm every installation is version 2.9.0 or later after remediation.
- Verify upgraded services start correctly and required Ranger functions remain operational.
- Review available security telemetry for unexpected activity affecting Ranger before remediation.
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-94: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-55799 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/mqpdrqrvd47x5vhy03xok4ylbo9wbqgjCVE 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.
Improper Control of Generation of Code ('Code Injection')
Improper Control of Generation of Code ('Code Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.