CVE-2026-87816: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in pglombardo PasswordPusher
PasswordPusher before 2.11.1 contains a time-of-check-to-time-of-use race condition in view limit enforcement that allows unauthenticated attackers to bypass expire_after_views limits. Attackers can send concurrent requests to the show endpoint to access one-time secrets multiple times before the view count is incremented and the push expires.
AI Analysis
Technical Summary
CVE-2026-87816 is a race condition vulnerability in PasswordPusher prior to version 2.11.1. The vulnerability arises from improper synchronization when enforcing the expire_after_views limit on one-time secrets. Attackers can exploit this by issuing concurrent requests to the show endpoint, allowing them to access the secret multiple times before the view count is updated and the secret expires, effectively bypassing the intended access restrictions.
Potential Impact
An unauthenticated attacker can bypass the expire_after_views limit on one-time secrets, potentially accessing sensitive information multiple times despite intended single-use restrictions. This undermines the confidentiality guarantees of PasswordPusher's secret sharing functionality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider implementing application-level request serialization or rate limiting on the show endpoint to reduce the risk of concurrent access bypass.
CVE-2026-87816: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') in pglombardo PasswordPusher
Description
PasswordPusher before 2.11.1 contains a time-of-check-to-time-of-use race condition in view limit enforcement that allows unauthenticated attackers to bypass expire_after_views limits. Attackers can send concurrent requests to the show endpoint to access one-time secrets multiple times before the view count is incremented and the push expires.
CVSS v4.0
Score 8.7high
Affected software
pkg:github/pglombardo/PasswordPusherRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-87816 is a race condition vulnerability in PasswordPusher prior to version 2.11.1. The vulnerability arises from improper synchronization when enforcing the expire_after_views limit on one-time secrets. Attackers can exploit this by issuing concurrent requests to the show endpoint, allowing them to access the secret multiple times before the view count is updated and the secret expires, effectively bypassing the intended access restrictions.
Potential Impact
An unauthenticated attacker can bypass the expire_after_views limit on one-time secrets, potentially accessing sensitive information multiple times despite intended single-use restrictions. This undermines the confidentiality guarantees of PasswordPusher's secret sharing functionality.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider implementing application-level request serialization or rate limiting on the show endpoint to reduce the risk of concurrent access bypass.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-09T10:32:34.109Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6aa1450bacd9273b494035f0
Added to database: 09/09/2026, 11:37:47 UTC
Last enriched: 09/09/2026, 11:52:18 UTC
Last updated: 09/09/2026, 12:38:14 UTC
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.