CouchDB before 3.5.3 allows pre-auth gzip DoS (CVE-2026-90797)
Any remote client can exhaust memory through unlimited gzip decompression on POST /_session; 3.5.3 fixes it.
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Vulnerability2 · 1 read
CVE-2026-90797
Unauthenticated gzip decompression DoS in Apache CouchDB
- CVSS 4.0
- 7.7 high
- EPSS
- —
- Published
- ·
- Modified
AI analysisSummaries by Vani AI
chttpd in Apache CouchDB 3.5.2 and earlier decompresses gzip without a limit. Any remote client can send a crafted request, including a pre-authentication POST to /_session, and exhaust memory, denying service. All platforms running those versions are affected. There is no confidentiality or integrity impact.
What to do: Upgrade Apache CouchDB to 3.5.3, which fixes the unlimited gzip decompression in chttpd.
| Product | Affected | Fixed in |
|---|---|---|
| Apache CouchDB | 3.5.2 and below | 3.5.3 |
Estimated exposure
No basis for an estimate.
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
Description · NVD
An unlimited gzip decompression routine in chttpd in Apache CouchDB 3.5.2 and below on all platforms allows any remote client to cause a denial of service via memory exhaustion. Users are recommended to upgrade to version 3.5.3, which fixes this issue.
- Weakness
- CWE-409
- 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:H/E:U/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:N/AU:Y/R:A/V:D/RE:M/U:Red