CVE-2026-90798
LOW 0.6A missing circuit-breaker in the replicator in Apache CouchDB 3.5.2 and below on all platforms allows the owner of a replication source or target to cause a denial of service via creating an infinite HTTP redirect loop. Users are recommended to upgrade to version 3.5.3, which fixes this issue.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.6%chance of exploitation in 30 days · 48th percentile
Impact if exploited
0.6CVSS 4.0 · LOW
- ConfidentialityNone
- IntegrityNone
- AvailabilityLow
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ⚠Privileges: Requires a low-privilege account
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
- ⚠Requirements: Specific conditions must be present
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Data snapshot:
Weakness (CWE)
- CWE-834: Excessive Iteration
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:U/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
References and research data (JSON)
All CVSS metrics
- LOW 0.6 v4.0 · CNA Primary
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:U/S:N/AU:Y/R:U/V:D/RE:M/U:Amber - LOW 0.6 v4.0 · NVD Secondary
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/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:U/V:D/RE:M/U:Amber
References
Patches & mitigations
- https://lists.apache.org/thread.html/pj83174r8f8f64odf47fwhozbfjtot0f CVE record · apache · Updated 2026-10-20T15:39:52.048Z
NVD · CVE-2026-90798 · Updated 2026-10-20T19:34:00.700
Advisories
- https://lists.apache.org/thread/m6d526fj57pvq5pswm2lp1shbdz3f417 CVE record · apache · Updated 2026-10-20T15:39:52.048Z
NVD · CVE-2026-90798 · Updated 2026-10-20T19:34:00.700 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-105157 EUVD · EUVD-2026-105157
Technical & other
- http://www.openwall.com/lists/oss-security/2026/10/20/13CVE record · CVE · Updated 2026-10-20T18:10:07.139Z
NVD · CVE-2026-90798 · Updated 2026-10-20T19:34:00.700