CVE-2019-18817
Istio vulnerable to denial of service
Istio 1.3.x before 1.3.5 allows Denial of Service because continue_on_listener_filters_timeout is set to True, a related issue to CVE-2019-18836.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Istio 1.3.x before 1.3.5 allows Denial of Service because continue_on_listener_filters_timeout is set to True, a related issue to CVE-2019-18836.
- Record
CVE-2019-18817- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-835
- Updated
- 2026-11-02
CVE List No score
Istio 1.3.x before 1.3.5 allows Denial of Service because continue_on_listener_filters_timeout is set to True, a related issue to CVE-2019-18836.
- Record
CVE-2019-18817- Updated
- 2026-11-02
EUVDEUVD-2022-5336 No score
Istio 1.3.x before 1.3.5 allows Denial of Service because continue_on_listener_filters_timeout is set to True, a related issue to CVE-2019-18836.
- Record
EUVD-2022-5336- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vc7h-cmp3-4hw5
Istio vulnerable to denial of service
Istio 1.3.x before 1.3.5 is vulnerable to denial of service because continue_on_listener_filters_timeout is set to True, a related issue to CVE-2019-18836.
- Record
GHSA-vc7h-cmp3-4hw5- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-835
- Updated
- 2026-11-02
OSV
Istio 1.3.x before 1.3.5 allows Denial of Service because continue_on_listener_filters_timeout is set to True, a related issue to CVE-2019-18836.
- Record
CVE-2019-18817- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-vc7h-cmp3-4hw5
Istio vulnerable to denial of service
Istio 1.3.x before 1.3.5 is vulnerable to denial of service because continue_on_listener_filters_timeout is set to True, a related issue to CVE-2019-18836.
- Record
GHSA-vc7h-cmp3-4hw5- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-835
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
istio.io/istioGo |
1.3.0 up to 1.3.5 | 1.3.5 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-18817 is a high vulnerability (CVSS 7.5) in Istio, published November 12, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.21%, the 68th percentile. Fixed in istio.io/istio 1.3.5.