---
id: "CVE-2026-63170"
page: "https://infrastack.ai/live/CVE-2026-63170"
kind: "vulnerability"
aliases: ["CVE-2026-63170"]
title: "Omnispace Agora: predictable calendar share tokens let attackers read shared calendars"
severity: "medium"
cvss: 6.3
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["calendar-sharing", "omnispace-agora", "other", "self-hosted"]
not_affected_if: ["no-calendar-sharing"]
published_at: "2026-11-13T17:17:34+00:00"
first_seen_at: "2026-11-13T17:48:02+00:00"
updated_at: "2026-11-13T17:48:58+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63170", "first_seen_at": "2026-11-13T17:48:02+00:00"}]
exploit_sources: []
---

# Omnispace Agora: predictable calendar share tokens let attackers read shared calendars

Link for people: https://infrastack.ai/live/CVE-2026-63170 (this .md is for agents)

Omnispace Agora Project through 26.10.0 generates shared-calendar iCal share tokens from predictable values such as object creation time. An unauthenticated attacker can compute the token and read a shared calendar's iCal feed without permission.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-11-13T17:48:02+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-63170

## From the sources

Omnispace Agora Project through 26.10.0 contains a predictable token generation vulnerability that allows unauthenticated attackers to forge the shared-calendar iCal share token by deriving md5Id() from predictable fields such as object creation time, which is self-disclosed through autorDate and the iCal CREATED field. Attackers can compute the creation minute and forge the md5Id token to access and read a shared calendar's iCal feed without authorization.

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_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_