What’s Vulnerable › Vulnerabilities

CVE-2025-30160: Redlib allows a Denial of Service via DEFLATE Decompression Bomb in restore_preferences Form

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-20 · updated 2026-06-17
• Weakness: CWE-400

Description

Redlib is an alternative private front-end to Reddit. A vulnerability has been identified in Redlib where an attacker can cause a denial-of-service (DOS) condition by submitting a specially crafted base2048-encoded DEFLATE decompression bomb to the restore_preferences form. This leads to excessive memory consumption and potential system instability, which can be exploited to disrupt Redlib instances. This vulnerability is fixed in 0.36.0.

Affected products

• redlib-org redlib: before 0.36.0 — fixed in 0.36.0

How to fix

Upgrade to a fixed version: redlib-org redlib 0.36.0. Check the vendor advisory for mitigations.

References

• https://github.com/redlib-org/redlib/commit/15147cea8e42f6569a11603d661d71122f6a02dc
• https://github.com/redlib-org/redlib/commit/2e95e1fc6e2064ccfae87964b4860bda55eddb9a
• https://github.com/redlib-org/redlib/security/advisories/GHSA-g8vq-v3mg-7mrg

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