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Splunk released fixes for multiple product vulnerabilities, led by CVE-2026-20253, a critical unauthenticated remote code execution flaw in the PostgreSQL sidecar service used by Splunk Enterprise. The bug stems from missing authentication on the sidecar endpoint and can be abused for arbitrary file creation or truncation, enabling full compromise of the Splunk application environment. Affected Splunk Enterprise versions include releases earlier than 10.4.0, 10.2.4, and 10.0.7, while Splunk Cloud Platform fixes include 10.4.2604.3 for the related exposure.
Security sources reported that CVE-2026-20253 is being actively exploited in limited, targeted attacks, prompting CISA to add it to the Known Exploited Vulnerabilities catalog and require rapid federal remediation. Splunk’s broader June security updates also addressed CVE-2026-20251, a remote code execution issue tied to unsafe jsonpickle deserialization in KV Store data, along with additional SSRF, XSS, CSS injection, access-control bypass, and data-exposure flaws across Splunk Enterprise, Splunk Cloud Platform, Splunk Secure Gateway, and Splunk SOAR. Organizations unable to patch immediately were advised to disable the PostgreSQL sidecar service and hunt for signs of exploitation such as path traversal requests, unexpected pg_dump or pg_restore execution, suspicious dump files, and outbound connections to unknown PostgreSQL servers.
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8 events from the most recent confirmed update back to the earliest known activity.
Palo Alto Networks published a product advisory for CVE-2026-0288 affecting PAN-OS User-ID Terminal Server Agent. The advisory identifies buffer overflow vulnerabilities in the component.
Palo Alto Networks published a product advisory for CVE-2026-0287 affecting PAN-OS. The advisory describes denial-of-service vulnerabilities in network traffic processing.
Palo Alto Networks published a product advisory for CVE-2026-0277 affecting Prisma Access Agent on iOS. The advisory identifies the issue as improper certificate validation.
ThreatAft reported that CVE-2026-20253, a critical unauthenticated remote code execution flaw in Splunk Enterprise's PostgreSQL sidecar service endpoint, was being actively exploited in the wild. The report described how missing authentication could enable file operations leading to arbitrary code execution and full compromise of the Splunk application environment.
CISA added CVE-2026-20253 to its Known Exploited Vulnerabilities catalog after the flaw was observed in active or limited targeted exploitation. The action required U.S. federal agencies to apply mitigations by June 21, 2026.
Palo Alto released security updates addressing multiple vulnerabilities across products including Cortex XSOAR, Prisma Access, Prisma Access Agent, Cortex XSIAM CommvaultSecurityIQ Marketplace, and PAN-OS. The notice highlighted CVE-2026-0274 and CVE-2026-0273 among the patched issues.
EG-FinCIRT published a notice highlighting Splunk's June 2026 security updates, including CVE-2026-20253 and CVE-2026-20251. The notice described affected products and urged organizations to deploy patches after testing.
Splunk released security updates to remediate multiple vulnerabilities across Splunk products, including CVE-2026-20253 in Splunk Enterprise. The fixes included versions such as Splunk Enterprise 10.0.7, 10.2.4, and later releases, with mitigation guidance to disable the PostgreSQL sidecar service if immediate upgrading was not possible.
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Splunk issued urgent fixes for **CVE-2026-20253**, a critical `CVSS 9.8` vulnerability in **Splunk Enterprise** that allows unauthenticated arbitrary file creation and truncation through a PostgreSQL sidecar service endpoint missing authentication controls. The flaw affects supported Splunk Enterprise releases prior to **10.4.0**, **10.2.4**, **10.0.7**, **9.4.12**, and **9.3.13** depending on branch, and Splunk said **Splunk Cloud is not affected** because it does not use Postgres sidecars. Splunk and national cyber authorities urged administrators to apply updates immediately, noting that no vendor detections or workarounds were initially available for the core issue. Public technical analysis from watchTowr Labs showed the bug can be reached through Splunk Web on port `8000`, which proxies requests to localhost-only PostgreSQL recovery endpoints, enabling attackers to abuse `/v1/postgres/recovery/backup` and `/restore` for filesystem access. Researchers demonstrated a full pre-auth exploitation chain that used path traversal, PostgreSQL connection-string injection, local `.pgpass` credentials, and PostgreSQL large-object export to gain arbitrary file write as the `splunk` user, then overwrite a Splunk Python script to achieve remote code execution. Splunk also disclosed additional Enterprise flaws including **CVE-2026-20251** (`CVSS 8.8`) in the Splunk Secure Gateway app due to unsafe `jsonpickle` deserialization, plus stored XSS and SSRF issues, prompting guidance to patch quickly, restrict dashboard creation and web exposure, and disable or remove vulnerable components where immediate upgrades are not possible.
Jul 23, 2026
Splunk disclosed **CVE-2026-20253**, a critical unauthenticated vulnerability in the PostgreSQL sidecar component of **Splunk Enterprise** and **Splunk Cloud Platform** that lets a network-reachable attacker create or truncate arbitrary files on the host. The flaw, tracked as **`VULN-67169`** and **`SVD-2026-0603`**, is rated **CVSS 9.8** and affects Splunk Enterprise `10.2.0` through `10.2.3` and `10.0.0` through `10.0.6`, as well as Splunk Cloud Platform versions below `10.4.2604.3` and below `10.2.2510.14`. Splunk said fixed versions are available, cloud instances are being actively patched, and no workaround exists other than upgrading. Splunk also published security content tied to **`SVD-2026-0603`** to help defenders simulate and validate detection of the exposed sidecar behavior, including replayable attack data mapped to **MITRE ATT&CK `T1210`**. Separately, the company disclosed **CVE-2026-20140**, a Windows-only local privilege-escalation flaw in Splunk Enterprise caused by DLL search-order hijacking during service startup; that issue can allow a low-privileged local user to gain **`NT AUTHORITY\SYSTEM`** privileges and has been fixed in supported branches, with Splunk advising upgrades, tighter write permissions, and monitoring for suspicious DLL drops and service restarts.
Jul 13, 2026
Splunk released security updates for **Splunk Enterprise**, **Splunk Cloud Platform**, and **Splunk Secure Gateway** to address eight vulnerabilities, including two high-severity issues. The most serious flaw, **`CVE-2025-20229`**, can allow authenticated remote code execution through unauthorized file upload and execution, while **`CVE-2025-20231`** can expose sensitive data because session data and authentication tokens may be logged in plaintext and protected with improper permissions. Splunk documentation for managing app and add-on objects is relevant because the attack surface includes application components and uploaded objects within Splunk environments. The update also fixes several medium-severity weaknesses, including **CSRF**, an **SPL security bypass with command execution**, unauthorized access to sensitive data, and unauthorized system changes. Splunk further remediated vulnerabilities in bundled third-party components including **idna**, **certifi**, **requests**, **urllib3**, **cryptography**, **axios**, and **Jinja2**. Organizations using affected versions have been urged to upgrade promptly, and exposure from **`CVE-2025-20231`** can also be reduced by disabling the **Splunk Secure Gateway App** until patches are applied.
Jul 24, 2026