# CVE-2026-87776

## Summary

- **CVE ID:** CVE-2026-87776
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-401, CWE-459
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 11, 2026

## Description

compression is a Node.js and Express compression middleware. In versions before 1.8.2, when a client aborts the connection while a compressed response is still being sent, the zlib stream created to compress that response is never destroyed, so each aborted compressed response leaks its native zlib memory. A remote unauthenticated attacker can repeatedly open requests and disconnect early, exhausting the available memory and crashing the server. All applications using compression are affected. The issue is fixed in compression 1.8.2, and users should upgrade to 1.8.2 or later.

## Affected Products

- compression — compression (0)
- compression — compression (1.8.2)

## References

- [CNA](https://github.com/expressjs/compression/security/advisories/GHSA-vc2v-76pw-4v95)
- [CNA](https://cna.openjsf.org/security-advisories.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.36%
- **EPSS Percentile:** 29.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._