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TI-2026-76884 Aliases CVE-2026-90797GHSA-r5m6-9384-3274

Pre-authentication gzip decompression bomb in Apache CouchDB

Priority MEDIUM 41CWE-409Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Apache CouchDB from 0 before 3.5.3 is affected. An unlimited gzip decompression routine in chttpd lets a remote client exhaust server memory, causing a denial of service. CWE-409 covers improper handling of highly compressed data. Any remote client can trigger it without authentication.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00669 52nd percentileScored 2026-11-07
Fix Fixed Apache CouchDB (Apache Software Foundation): 3.5.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache CouchDBbefore 3.5.33.5.3Patch availableCNA
  • Apache CouchDB VendorApache Affected before 3.5.3 Fixed in 3.5.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:apache:couchdb:*:*:*:*:*:*:*:*——Apache
  • cpe:2.3:a:apache:couchdb:*:*:*:*:*:*:*:* Versions — — ·Apache

Remediation

Upgrade Apache CouchDB to version 3.5.3, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Apache CouchDB (Apache Software Foundation) Fixed in 3.5.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache CouchDB 3.5.3

    6 records Highest priority Priority MEDIUM 2 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2026-76883 Unvalidated setting in Apache CouchDB allows OS command executionPriority MEDIUM 43
    • TI-2026-76887 Missing authorization in Apache CouchDB exposes prefixed system databasesPriority LOW 38
    • TI-2026-76901 Credential disclosure in Apache CouchDB replication endpointsPriority LOW 30
    Show all 6 records →

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-90797
  2. 2026-10-20 Weakness changed · CISA ADP
  3. 2026-10-20 CISA SSVC decision points changed
  4. 2026-10-20 Priority changed: MEDIUM → LOW
  5. 2026-10-21 Alias added: GHSA-r5m6-9384-3274
  6. 2026-10-22 Priority changed: LOW → MEDIUM

References

Advisory 1

Other 1

  • TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-30292 Apache OFBiz: Confused controller-view authorization logic (forced browsing) KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-26062 Apache OFBiz: Unauthenticated endpoint could allow execution of screen rendering code KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-21190 Apache OFBiz: Path traversal leading to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18186 Apache HugeGraph-Server: Command execution in gremlin KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-25106 Deserialization of untrusted data in Apache ActiveMQ KEVCVSS 3.1CRITICAL 10.0
See all 4053 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences