CVE-2026-28328 — SolarWinds Observability Self-Hosted broken authorization schema
SolarWinds Observability Self-Hosted was found to be affected by a broken authorization schema that can allow low-privileged users to access and modify information beyond their assigned permissions.
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- Technical severity (high)+6
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.
CISA SSVC assessment CISA
Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.
Remediation
Fixes and mitigations documented by the sources — linked to the original advisory.
No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.
First 24 hours
Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.
- Identify exposed assets running the affected vendor/product/version combinations (Solarwinds Observability Self-hosted).
- No fix documented in the sources: reduce exposure and monitor the vendor advisory.
- Search available logs for exploit probes matching the vulnerability class (access control), errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Solarwinds | Observability Self-hosted | version 2026.2.3 and all previous versions | Vulnerable | CVE Program (cve.org) e CISA ADP |
Attack characteristics
The CVSS vector, decoded. It describes the attack, not your exposure to it.
Every base score collected
Sources score independently and may disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Scored by |
|---|---|---|---|---|---|
| 8.8 | CVSS 3.1 | High | 2.8 | 5.9 | psirt@solarwinds.com via NIST National Vulnerability Database |
| 8.8 | CVSS 3.1 | High | — | — | GitHub, Inc. via GitHub Security Advisories |
| 8.8 | CVSS 3.1 | High | — | — | SolarWinds via CVE Program (cve.org) e CISA ADP |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (score shown at the top: psirt@solarwinds.com) Weakness MITRE
Weakness class according to MITRE’s CWE catalog.
Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
- Audit administrative actions and access to resources outside each user’s normal pattern.
Timeline
What happened to this CVE, newest first.
- 2026
- Source status changed · Received → Awaiting Analysis
- SSVC assessment updated
- Affected products added · solarwinds/solarwinds observability self-hosted
- Record published
- CVSS changed · 8.8
- Source status changed · → Received
- Record created in this database
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 2× References added · Oct 20, 2026 – Oct 21, 2026
- 1× Official description updated · Oct 20, 2026 – Oct 20, 2026
References
5 on the record
- documentation.solarwinds.com/en/success_center/orionplatform/content/release_notes/hco_2026-4_rele
- github.com/advisories/GHSA-hqgx-66xg-f35h
- nvd.nist.gov/vuln/detail/CVE-2026-28328
- www.solarwinds.com/trust-center/security-advisories/CVE-2026-28328
- documentation.solarwinds.com/en/success_center/orionplatform/content/core-secure-configuration.htm
Elsewhere on this site
Related CVEs (same products)
- Medium CVE-2026-28329 SolarWinds Observability Self-Hosted Server-Side Request Forgery (SSRF) 1d
- Medium CVE-2026-28330 SolarWinds Observability Self-Hosted Cross-Site Scripting Vulnerability 1d
- Critical CVE-2026-28324 SolarWinds Observability Self-Hosted Remote Code Execution Vulnerability 29d
- High CVE-2026-28325 SolarWinds Observability Self-Hosted Unauthenticated Remote Code Execution Vulnerability 29d
- Medium CVE-2026-28301 SolarWinds Observability Self-Hosted Open Redirect Vulnerability Jun 9, 2026
- High CVE-2026-28297 SolarWinds Observability Self-Hosted Stored Cross-Site Scripting Vulnerability Mar 26, 2026
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No FIRST EPSS score.
- No fixed version, patch or mitigation documented.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.
Answered from this record
Text assembled only from the fields above — no additional claims.
What should defenders know first?
CVE-2026-28328 is "SolarWinds Observability Self-Hosted broken authorization schema", rated High. It affects Observability Self-hosted (Solarwinds); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 8.8 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.
Comments
Moderated technical discussion. Read the community guidelines.
No comments yet.
Sign in or create an account to comment and suggest corrections.