PatchSiren cyber security CVE debrief
CVE-2026-53874 picklescan CVE debrief
CVE-2026-53874 is a critical vulnerability in picklescan before 1.0.1, allowing unauthenticated users to execute arbitrary code by hiding eval calls nested under callable objects via getattr. Attackers can embed malicious code in pickle files that evades detection but executes when the pickle is loaded from untrusted sources. This vulnerability has a CVSS score of 9.3 and is classified as CRITICAL. Affected users and administrators should be aware of this vulnerability and take immediate action to upgrade to a patched version or apply compensating controls.
- Vendor
- picklescan
- Product
- Unknown
- CVSS
- CRITICAL 9.3
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-06-17
- Original CVE updated
- 2026-06-23
- Advisory published
- 2026-06-17
- Advisory updated
- 2026-06-23
Who should care
Users and administrators of picklescan before version 1.0.1 should be aware of this vulnerability and take immediate action to upgrade to a patched version or apply compensating controls. This includes operators, platform administrators, vulnerability management teams, and security teams who may be impacted by this vulnerability.
Technical summary
The vulnerability is caused by an unsafe deserialization issue in picklescan before 1.0.1. This allows attackers to execute arbitrary code by embedding malicious code in pickle files. The vulnerability has a CVSS score of 9.3 and is classified as CRITICAL. Users should review official advisories and take immediate action to mitigate this vulnerability. Affected product deployments should be identified and verified for exposure, with compensating controls implemented where necessary. Security teams should track exceptions, retest remediated assets, and review relevant monitoring, detection, and logs for exposed assets that need extra review.
Defensive priority
High
Recommended defensive actions
- Upgrade picklescan to version 1.0.1 or later
- Implement compensating controls such as validating and sanitizing pickle files
- Monitor for suspicious activity and implement logging and auditing
- Review relevant monitoring, detection, and logs for exposed assets that need extra review
- Track exceptions, retest remediated assets, and close the item only after evidence is documented
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
- Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
Evidence notes
The CVE record was published on 2026-06-17T17:17:25.733Z and was last modified on 2026-06-23T03:16:41.477Z. The NVD entry is currently Deferred. Evidence is limited to public sources and may not reflect the full scope or impact of this vulnerability. Defenders should verify affected systems and review official advisories for specific guidance.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-06-17T17:17:25.733Z and has not been modified since then. The NVD entry is currently Deferred.