CVE-2019-13126
Integer Overflow or Wraparound in NATS Server
An integer overflow in NATS Server before 2.0.2 allows a remote attacker to crash the server by sending a crafted request. If authentication is enabled, then the remote attacker must have first authenticated.
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
An integer overflow in NATS Server before 2.0.2 allows a remote attacker to crash the server by sending a crafted request. If authentication is enabled, then the remote attacker must have first authenticated.
- Record
CVE-2019-13126- 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-190
- Updated
- 2026-11-02
CVE List No score
An integer overflow in NATS Server before 2.0.2 allows a remote attacker to crash the server by sending a crafted request. If authentication is enabled, then the remote attacker must have first authenticated.
- Record
CVE-2019-13126- Updated
- 2026-11-02
EUVDEUVD-2021-1121 No score
An integer overflow in NATS Server before 2.0.2 allows a remote attacker to crash the server by sending a crafted request. If authentication is enabled, then the remote attacker must have first authenticated.
- Record
EUVD-2021-1121- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-jp4j-47f9-2vc3
Integer Overflow or Wraparound in NATS Server
An integer overflow in NATS Server before 2.2.0 allows a remote attacker to crash the server by sending a crafted request.
Specific Go Packages Affected
github.com/nats-io/nats-server/v2/server
- Record
GHSA-jp4j-47f9-2vc3- 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-190
- Updated
- 2026-11-02
OSV
An integer overflow in NATS Server before 2.0.2 allows a remote attacker to crash the server by sending a crafted request. If authentication is enabled, then the remote attacker must have first authenticated.
- Record
CVE-2019-13126- 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-jp4j-47f9-2vc3
Integer Overflow or Wraparound in NATS Server
An integer overflow in NATS Server before 2.2.0 allows a remote attacker to crash the server by sending a crafted request.
Specific Go Packages Affected
github.com/nats-io/nats-server/v2/server
- Record
GHSA-jp4j-47f9-2vc3- 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-190
- Updated
- 2026-11-02
OSVGO-2022-0852 No score
Integer Overflow or Wraparound in NATS Server in github.com/nats-io/nats-server
Integer Overflow or Wraparound in NATS Server in github.com/nats-io/nats-server
- Record
GO-2022-0852- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/nats-io/nats-server/v2Go |
before 2.2.0 | 2.2.0 |
github.com/nats-io/nats-serverGo |
All versions | None known |
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-2019-13126 is a high vulnerability (CVSS 7.5) in Linuxfoundation Nats-server, published July 29, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.77%, the 78th percentile. Fixed in github.com/nats-io/nats-server/v2 2.2.0.
References
twistlock.com/labs-blog/finding-dos-vulnerability-nats-go-fuzz-cve-2019-13126
github.com/nats-io/nats-server/pull/1053
nvd.nist.gov/vuln/detail/CVE-2019-13126