CVE-2026-39350
No exploitation reported by the sources we read.
- Published2026-04-15
- Fixed in0.0.0-20260403004500-692e460c342d
- WeaknessCWE-185 · CWE-863
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Istio is an open platform to connect, manage, and secure microservices. In versions 1.25.0 through 1.27.8, 1.28.0 through 1.28.5, 1.29.0, and 1.29.1, the serviceAccounts and notServiceAccounts fields in AuthorizationPolicy incorrectly interpret dots (.) as a regular expression matcher. Because . is a valid character in a service account name, an AuthorizationPolicy ALLOW rule targeting a service account such as cert-manager.io also matches cert-manager-io, cert-managerXio, etc. A DENY rule targeting the same name fails to block those variants. Fixes are available in versions 1.29.2, 1.28.6, and 1.27.9.
Timeline
dates in UTC- 2026-04-1523:16CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-39350?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-39350?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
OSV · NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 0.0 | ≥ 0.0.0-20241024090207-0bf27d49ba4b, < 0.0.0-20260403004500-692e460c342d | 0.0.0-20260403004500-692e460c342d | OSV |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.29 | ≥ 1.29.0, < 1.29.2 | 1.29.2 | NVD |
| 1.28 | ≥ 1.28.0, < 1.28.6 | 1.28.6 | NVD |
| 1.x | ≥ 1.25.0, < 1.27.9 | 1.27.9 | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update istio.io/istio to 0.0.0-20260403004500-692e460c342d
Advisories and patches
- github.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- Published
- 2026-04-15
- Last Modified
- 2026-06-17
- NVD status
- Analyzed
Frequently asked questions
What is CVE-2026-39350?
Is CVE-2026-39350 actively exploited?
What is the CVSS score for CVE-2026-39350?
Running istio.io/istio? Hear about its next vulnerability
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.