# CVE-2023-41378: Calico Typha denial of service vulnerability

Source: https://junglewise.ai/threats/cve-2023-41378-calico-typha-denial-of-service-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-11-06  
License: CC BY 4.0 with a link back

CVE-2023-41378 · Severity: low · CVSS 3.1 · Published 2023-11-06

Calico Typha denial of service vulnerability

Technologies: [github.com/projectcalico/calico (Go)](https://junglewise.ai/threats/technologies/github-com-projectcalico-calico). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2023-41378 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2023-41378 being exploited in the wild.

**How severe is CVE-2023-41378?** Low severity, with a CVSS score of 3.1, published 6 November 2023.

**Which products and versions are affected?** github.com/projectcalico/calico (Go) SEMVER:introduced=3.26.0,fixed=3.26.3.

**Is there a fix for CVE-2023-41378?** Yes. github.com/projectcalico/calico (Go): upgrade to 3.26.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2023-41378?** Check whether you run github.com/projectcalico/calico (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/projectcalico/calico (Go): upgrade to 3.26.3 or later

  ```sh
  go get github.com/projectcalico/calico@v3.26.3
  ```


## Affected products

- github.com/projectcalico/calico (Go) SEMVER:introduced=3.26.0,fixed=3.26.3

## Identifiers

- CVE-2023-41378
- GHSA-5r5h-q934-cccp

## Related threats

- [Tigera Calico sensitive information disclosure in Azure IPAM logs](https://junglewise.ai/threats/cve-2026-41185-tigera-calico-sensitive-information-disclosure-in-azure-ipam-logs)
- [Project Calico sensitive information disclosure in install-cni logs](https://junglewise.ai/threats/cve-2026-41184-project-calico-sensitive-information-disclosure-in-install-cni)
- [GO-2024-2801 - Calico privilege escalation vulnerability in github.com/projectcalico/calico](https://junglewise.ai/threats/cve-2024-33522-calico-privilege-escalation-vulnerability)
- [Calico vulnerable to pod route hijacking](https://junglewise.ai/threats/cve-2022-28224-calico-vulnerable-to-pod-route-hijacking)
- [Exposure of Sensitive Information to an Unauthorized Actor and Insertion of Sensitive Information Into Sent Data in Calico](https://junglewise.ai/threats/cve-2020-13597-exposure-of-sensitive-information-to-an-unauthorized-actor-and)