Security readout for executives and security teams
Plain-English summary
Cribl Edge for Linux has a critical local privilege-escalation flaw. A user who already has access to the host could trigger command injection and run commands as the Cribl Edge service account, potentially affecting data collection, integrity, and host operations.
Executive priority
Treat this as urgent for any Cribl Edge Linux deployment with local user access. Prioritize upgrade and access review, especially on systems supporting logging, telemetry, or security monitoring workflows.
Technical view
The supplied CVE describes CWE-20/CWE-78 command injection in Cribl Edge for Linux versions 3.2.0 through 4.17.0. It allows a local unprivileged user to execute arbitrary commands in the service-account context. The CVSS vector says network/no-privileges, which conflicts with the local-access description.
Likely exposure
Exposure is limited to Linux systems running affected Cribl Edge versions 3.2.0 through 4.17.0. The bundle does not identify other Cribl products as affected. Shared Linux hosts or environments where non-admin users can log in carry higher practical risk.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation. Public evidence supports severe impact if an attacker already has local access, but does not provide proof of exploitation in the wild.
Researcher notes
Evidence is source-limited. The description says local unprivileged access, while the CVSS vector indicates network/no privileges. Do not assume remote exploitability without vendor clarification. The referenced 4.17.1 security-fix page suggests the remediation path, but confirm current vendor guidance.
Mitigation direction
- Review Cribl Edge 4.17.1 security-fix guidance.
- Upgrade affected Linux Cribl Edge deployments to a fixed vendor-supported release.
- Restrict local shell access on Cribl Edge hosts.
- Review service-account privileges and reduce unnecessary permissions.
- Monitor Cribl Trust Portal for updated advisories.
Validation and detection
- Inventory Cribl Edge versions on Linux hosts.
- Flag versions 3.2.0 through 4.17.0 as affected.
- Confirm remediation status against Cribl 4.17.1 release notes.
- Review host logs for unexpected service-account command execution.
- Check Cribl Trust Portal for later scope or fix updates.
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-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter 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 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-2026-45391 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
3 official scoresWe 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-ADPCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——CriblCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9CriblVulnerability scoring details
Base CVSS 4.0 score
8.5HighVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/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
- Cribl Edge 4.17.1 Security FixesCVE reference, Cribl · release-notes
- Cribl Trust PortalCVE reference, Cribl · 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 Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.