{"id":"CVE-2025-30160","aliases":["EUVD-2025-7180","GHSA-g8vq-v3mg-7mrg"],"status":"published","title":"Redlib allows a Denial of Service via DEFLATE Decompression Bomb in restore_preferences Form","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.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00578,"percentile":0.47896,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400","CWE-502"],"published":"2025-03-20T18:09:48Z","modified":"2026-10-28T02:30:37Z","fixes":[{"ecosystem":"crates.io","package":"redlib","fixed_in":["0.36.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"crates.io","package":"redlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.36.0"}]}]},{"source":"osv","ecosystem":"crates.io","package":"redlib","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.36.0"}]}]}],"products":[{"vendor":"redlib","product":"redlib"},{"vendor":"redlib-org","product":"redlib"}],"references":[{"url":"https://github.com/redlib-org/redlib/security/advisories/GHSA-g8vq-v3mg-7mrg","tags":["x_refsource_CONFIRM","Patch","Vendor Advisory","advisory","web"]},{"url":"https://github.com/redlib-org/redlib/commit/15147cea8e42f6569a11603d661d71122f6a02dc","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/redlib-org/redlib/commit/2e95e1fc6e2064ccfae87964b4860bda55eddb9a","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/crewjam/saml/security/advisories/GHSA-5mqj-xc49-246p","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-30160","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-g8vq-v3mg-7mrg"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/30xxx/CVE-2025-30160.json","tags":["advisory"]},{"url":"https://github.com/redlib-org/redlib","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-30160","title":"Redlib allows a Denial of Service via DEFLATE Decompression Bomb in restore_preferences Form","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.","status":"published","published":"2025-03-20T18:09:48.763Z","modified":"2025-03-20T19:19:50.11Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-400","CWE-502"],"updated_at":"2026-11-02T14:32:35.418416Z"}],"euvd":[{"id":"EUVD-2025-7180","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.","status":"published","published":"2025-03-20T18:09:48Z","modified":"2025-03-20T19:19:50Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T20:52:56.973752Z"}],"ghsa":[{"id":"GHSA-g8vq-v3mg-7mrg","title":"Redlib allows a Denial of Service via DEFLATE Decompression Bomb in restore_preferences Form","description":"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 was introduced in 2e95e1fc6e2064ccfae87964b4860bda55eddb9a and fixed in 15147cea8e42f6569a11603d661d71122f6a02dc.\n\n### Impact\n_What kind of vulnerability is it? Who is impacted?_\n\nThis vulnerability allows a remote attacker with network access to exploit the preference restoration mechanism by providing a compressed payload that expands dramatically upon decompression. The issue arises because the system automatically decompresses user-supplied data without enforcing size limits, potentially leading to:\n\n- Out-of-memory (OOM) conditions\n- OS-level resource exhaustion, potentially leading to broader system instability or crashes\n- Repeated exploitation, keeping the target system in a persistent degraded state\n- Denial-of-service of any public instance\n\n### Patches\nThe problem has been patched in 15147cea8e42f6569a11603d661d71122f6a02dc. Users should upgrade to v0.36.0.\n\n### Workarounds\nUntil a patch is available, users can:\n\n- Implement request size limits at the web server or application level to reject excessively large inputs.\n- Disable or restrict the restore_preferences route (`/settings/encoded-restore`) at the reverse-proxy level if not required.\n- Monitor server logs for unusually large or repeated restore_preferences requests and block offending IPs.","status":"published","published":"2025-03-21T15:26:55Z","modified":"2025-03-21T15:26:55Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-400","CWE-502"],"updated_at":"2026-11-02T14:38:35.74197Z"}],"nvd":[{"id":"CVE-2025-30160","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.","status":"published","published":"2025-03-20T19:15:38.383Z","modified":"2026-06-17T09:08:16.27Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-400","CWE-502"],"updated_at":"2026-11-02T14:10:54.744127Z"}],"osv":[{"id":"CVE-2025-30160","title":"Redlib allows a Denial of Service via DEFLATE Decompression Bomb in restore_preferences Form","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.","status":"published","published":"2025-03-20T18:09:48.763Z","modified":"2026-10-28T02:30:37.597977461Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-400","CWE-502"],"updated_at":"2026-11-02T15:44:47.708311Z"},{"id":"GHSA-g8vq-v3mg-7mrg","title":"Redlib allows a Denial of Service via DEFLATE Decompression Bomb in restore_preferences Form","description":"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 was introduced in 2e95e1fc6e2064ccfae87964b4860bda55eddb9a and fixed in 15147cea8e42f6569a11603d661d71122f6a02dc.\n\n### Impact\n_What kind of vulnerability is it? Who is impacted?_\n\nThis vulnerability allows a remote attacker with network access to exploit the preference restoration mechanism by providing a compressed payload that expands dramatically upon decompression. The issue arises because the system automatically decompresses user-supplied data without enforcing size limits, potentially leading to:\n\n- Out-of-memory (OOM) conditions\n- OS-level resource exhaustion, potentially leading to broader system instability or crashes\n- Repeated exploitation, keeping the target system in a persistent degraded state\n- Denial-of-service of any public instance\n\n### Patches\nThe problem has been patched in 15147cea8e42f6569a11603d661d71122f6a02dc. Users should upgrade to v0.36.0.\n\n### Workarounds\nUntil a patch is available, users can:\n\n- Implement request size limits at the web server or application level to reject excessively large inputs.\n- Disable or restrict the restore_preferences route (`/settings/encoded-restore`) at the reverse-proxy level if not required.\n- Monitor server logs for unusually large or repeated restore_preferences requests and block offending IPs.","status":"published","published":"2025-03-21T15:26:55Z","modified":"2025-03-21T15:26:55Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-400","CWE-502"],"updated_at":"2026-11-02T15:46:47.472172Z"}]}}