Authorization Flaw in neutron (CVE-2026-49299)
Summary
Vulnerability in neutron (CVE-2026-49299). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 26.0.4 or later.
Original description
The description as published by the source.
In OpenStack Neutron before 28.0.1, the tagging controller enforces plural policy action names on single-tag write operations while the defined policy rules use singular names. The mismatched names evaluate as allowed under the default policy, permitting a project reader to create and update tags on same-project resources. Deployments running Neutron 26.0.0 or later are affected.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-49299 has been found in neutron.
Risk of unauthorized operations or information disclosure.
What to do: upgrade neutron to 26.0.4 or later.
If unsure, ask your IT team or search "neutron CVE-2026-49299" on the vendor's site.
CVE-2026-49299 (neutron) — CWE-863
Patched: 26.0.4 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Incorrect authorization (CWE-863) exists in neutron.
Check the vendor advisory for the affected versions of neutron.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 26.0.4.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'neutron' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'neutron' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
neutronを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade neutron to 26.0.4ステージング環境で 26.0.4 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-49299 neutron
- Ubuntu UBUNTU-CVE-2026-49299 neutron
References
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- patch review.opendev.org
- report bugs.launchpad.net
- web openwall.com
- web github.com
- web openwall.com
- web opendev.org