CVE-2026-52783: high-severity vulnerability in opf openproject
OpenProject: Information Disclosure (cleartext storage of data) on localhost through memcached via Others "storage.<id>.httpx_access_token" leads to Sensitive Data Exposure
Published · Updated
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.2epss 0.2%
exploitation probability
0.2%top 91% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
Affected products
opf · openprojectRelated CVEs — opf openproject
In the same product, most dangerous first.
CVE-2023-33960HIGHOpenProject vulnerable to project identifier information leakage through robots.txtEPSS 1.3%CVE-2021-43830HIGHSQL injection in OpenProjectEPSS 1.0%CVE-2021-32763MEDIUMRegular Expression Denial of Service in OpenProject forum messagesEPSS 0.9%CVE-2023-31140MEDIUMOpenProject user sessions not terminated after activation of 2FAEPSS 0.9%CVE-2026-25763CRITICALCommand Injection on OpenProject repositories leads to Remote Code ExecutionEPSS 0.7%CVE-2026-30235MEDIUMBusiness Logic Error on OpenProject through hyperlinks in markdown using DOM clobberingEPSS 0.6%