LowVulnerability

CVE-2023-28858: redis-py async connection leaks response data to unrelated requests

Source: NVD(opens in a new tab)
Identifier: CVE-2023-28858
Published: March 26, 2023
Record updated: October 9, 2026

Affected: redis >= 4.4.0, < 4.4.3, fixed in 4.4.3, released March 22, 2023, 4 days before disclosure
redis >= 4.5.0, < 4.5.3, fixed in 4.5.3, released March 22, 2023, 4 days before disclosure
redis >= 4.2.0, < 4.3.6, fixed in 4.3.6, released March 22, 2023, 4 days before disclosure
Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 1.0%

Summary

redis-py before 4.5.3 leaves a connection open after an async Redis command is canceled at an inopportune time. The connection can then send response data to the client of an unrelated request, in an off-by-one manner (CWE-193). NVD notes that 4.3.6, 4.4.3, and 4.5.3 were released to change the pipeline behavior, and points to CVE-2023-28859 for data leakage across AsyncIO connections in general.

Mitigation

Fixed in 4.3.6, 4.4.3, and 4.5.3 (the source notes these releases changed the behavior for pipeline operations).

Details

Scores and exploitation

CVSS score: 3.7(low)
Patch available: Yes
EPSS: 1.0%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 4, 2026.

Weaknesses and techniques

Weakness (CWE): CWE-193

Affected

Packages: redis@>= 4.4.0, < 4.4.3 (fixed: 4.4.3)
redis@>= 4.5.0, < 4.5.3 (fixed: 4.5.3)
redis@>= 4.2.0, < 4.3.6 (fixed: 4.3.6)
Vendors: OpenAI

Classification

Attack type: Denial of service
Attack sophistication: Advanced
AI component targeted: API
Impact: Confidentiality
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2023-28858

First tracked: February 15, 2026 at 08:50 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 80% (self-assessed)

Affected packages in the Exposure Registry

Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.

redisPyPINo LLM dependency detected · 55 tracked dependents

Summary

Mitigation

Affected packages in the Exposure Registry

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