CVE-2026-52783
HIGH
MEDIUM
Priority: 0.02
BB Relevance:
56/100
Published: 2026-06-26
Modified: 2026-10-25
First seen: 2026-10-29
Status: active
Attack Surface
Network
No Interaction
Conf. Impact
Integ. Impact
Scope Change
CVSS Vector Breakdown
AV:
Network
AC:
High
PR:
Low
UI:
None
S:
Changed
C:
High
I:
High
A:
None
Description
OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, OpenProject's Storages module writes the OneDrive/SharePoint userless OAuth access_token plaintext to Rails.cache under the deterministic key storage.<id>.httpx_access_token, repopulated continuously by an hourly cron and every userless-OAuth call site (see Write cadence). None of the three allowed cache backends (file_store, memcache, redis) encrypts at rest. An attacker with read access to the cache backend recovers the Azure-AD application-tier bearer with an anonymous get over the memcached binary protocol (or the equivalent against Redis). This vulnerability is fixed in 17.3.3 and 17.4.1.