CVE-2026-90799
LOW 1.3Unsafe binary deserialisation in chttpd in Apache CouchDB 3.5.2 and below on all platforms allows an authenticated user to cause a denial of service via memory exhaustion. 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 · 51st percentile
Impact if exploited
1.3CVSS 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: No special attack requirements
✓ 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-502: Deserialization of Untrusted Data
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:U/S:N/AU:Y/R:A/V:D/RE:M/U:Amber
References and research data (JSON)
All CVSS metrics
- LOW 1.3 v4.0 · CNA Primary
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:U/S:N/AU:Y/R:A/V:D/RE:M/U:Amber - LOW 1.3 v4.0 · NVD Secondary
CVSS:4.0/AV:N/AC:L/AT:N/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:A/V:D/RE:M/U:Amber
References
Patches & mitigations
- https://lists.apache.org/thread.html/pj83174r8f8f64odf47fwhozbfjtot0f CVE record · apache · Updated 2026-10-20T15:40:16.600Z
NVD · CVE-2026-90799 · Updated 2026-10-20T19:34:00.700
Advisories
- https://lists.apache.org/thread/bqxkm19hw8985t7opz675b29hs1zl4z9 CVE record · apache · Updated 2026-10-20T15:40:16.600Z
NVD · CVE-2026-90799 · Updated 2026-10-20T19:34:00.700 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-105158 EUVD · EUVD-2026-105158
Technical & other
- http://www.openwall.com/lists/oss-security/2026/10/20/14CVE record · CVE · Updated 2026-10-20T18:10:08.069Z
NVD · CVE-2026-90799 · Updated 2026-10-20T19:34:00.700