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CVE-2026-70917 resides in the Oracle Hyperion Financial Management (HFM) product, specifically within its Security component. The flaw affects version 11.2.25.0.000 and is classified as easily exploitable. The core issue stems from insufficient authorization checks during internal service communications. Although the attacker is unauthenticated in terms of application credentials, the vulnerability requires the attacker to have local logon access to the underlying infrastructure host where HFM executes. This local foothold is the primary prerequisite, differentiating it from remote network-based exploits.
Once logged onto the host, the attacker can interact with local inter-process communication (IPC) endpoints or named pipes that the HFM Security module exposes. These endpoints are designed for trusted local services to query configuration and metadata. The flaw allows a malicious local user to craft specific malformed requests to these endpoints, bypassing the standard authentication handshake. Because the service does not properly validate the caller’s privilege level after the initial connection, the attacker can enumerate internal object handles and memory pointers related to user sessions and data caches.
The successful exploitation does not require user interaction (UI:N) and does not depend on any specific privileges on the application itself (PR:N), as the vulnerability triggers before the application’s role-based access control (RBAC) is enforced. The attack complexity is low (AC:L), meaning the required steps are well-defined and repeatable without needing advanced knowledge of memory corruption. The impact is limited to a subset of accessible data, specifically allowing unauthorized read access (C:L) to stored financial reports, configuration parameters, and possibly cached user credentials in plaintext or weakly hashed form.
The Confidentiality impact is rated Low because the attack does not grant full database access, only what is exposed through the vulnerable local IPC channel. Integrity and Availability are not affected (I:N/A:N). The CVSS v3.1 vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N, resulting in a base score of 4.0. This score places the vulnerability in the Medium severity band. The NVD published this entry on August 18, 2026, with the last modification on August 24, 2026, indicating active enrichment and potential vendor advisory references. Affected software configurations include a single known vulnerable version, and no other versions are listed, suggesting this might be a specific regression introduced in this point release.
DailyCVE Form:
Platform: Oracle Hyperion FM
Version: 11.2.25.0.000
Vulnerability : Unauthorized Read Access
Severity: Medium (CVSS 4.0)
date: 2026-08-18
Prediction: 2026-10-20 (Next CPU)
What Undercode Say:
Analytics
The attack surface is local IPC. Monitor /tmp/hfm_ipc_ and /var/log/hfm/security.log for anomalous connection attempts from non-service accounts. Use the following bash command to check for unexpected listeners on Unix domain sockets owned by the hyperion user:
netstat -lx | grep -i hyperion
ss -x | grep -i hfm_security
To enumerate the current HFM version and patch level from the command line, use the product inventory:
cd $ORACLE_HOME/OPatch && ./opatch lsinventory -product “Hyperion Financial Management” -version
For real-time audit, enable Linux auditd rules to capture all access to the HFM configuration files:
auditctl -w /opt/oracle/hfm/config/ -p r -k hfm_config_read
A simple Python stub to test the presence of the vulnerable endpoint (educational detection) would attempt a null session handshake to the local socket:
import socket
s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
try: s.connect(“/tmp/.hfm_security.ipc”); s.send(b”\x00\x01\x02″); print(s.recv(1024))
except: print(“Not vulnerable or socket protected”)
Exploit: (Educational Purposes!)
- Gain local shell access on the target host with a low-privileged OS user.
- Identify the Unix domain socket or named pipe for HFM Security – typically located in /tmp/ or /var/run/ with predictable naming (e.g., .hfm_sec_
). - Use a script to connect to the socket and send a crafted probe packet that omits the required authentication token length field.
- The service, due to the flaw, will reply with a memory dump containing raw heap pointers and cached data segments.
- Parse the returned binary blob to extract sensitive strings such as database connection strings, service account usernames, or financial dimension names.
- Save the extracted data to a local file for offline analysis. No privilege escalation is required beyond the initial local login.
Protection: from this CVE
- Apply the Oracle Critical Patch Update (CPU) advisory as soon as it is released, specifically the patch for CVE-2026-70917.
- Restrict local logon access to the Hyperion host using strict network and host-based firewalls – only allow SSH/console from trusted admin jump boxes.
- Implement application-level whitelisting (e.g., SELinux or AppArmor) to confine the HFM processes and prevent any non-standard binaries from attempting to connect to internal sockets.
- Change the default permissions on the IPC socket directory (e.g., /tmp/) to 750 and set the owning group to a dedicated ‘hfmadmin’ group, removing world-read/write access.
- Enable comprehensive logging of all local process creations and socket connections using osquery or sysdig, and alert on any connection to the HFM socket from processes not matching the expected binary hash.
- As a temporary workaround, disable the affected Security component service if the business can tolerate it, or restart the HFM services periodically to clear caches until patching is possible.
Impact:
An unauthenticated local attacker can read a subset of sensitive Oracle Hyperion Financial Management data. This includes financial planning documents, stored report definitions, and cached authentication tokens. While the confidentiality impact is limited to a subset, this information can serve as a stepping stone for further attacks, such as credential reuse or understanding internal financial structures. The vulnerability does not lead to data modification, deletion, or denial of service. The business impact is primarily regulatory and reputational, as unauthorized access to financial projections and internal metrics may violate compliance frameworks (e.g., SOX, GDPR) if the exposed data contains personally identifiable financial information. The low severity score means it is unlikely to be weaponized in mass campaigns, but targeted espionage against specific enterprise deployments remains a credible risk until patched.
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Sources:
Reported By: nvd.nist.gov
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