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TI-2026-22072 Aliases CVE-2026-27695GHSA-76rv-2r9v-c5m6

zae-limiter: DynamoDB hot partition throttling enables per-entity Denial of Service

Priority LOW 24CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-770.

Summary

zae-limiter is a rate limiting library using the token bucket algorithm. Prior to version 0.10.1, all rate limit buckets for a single entity share the same DynamoDB partition key (`namespace/ENTITY#{id}`). A high-traffic entity can exceed DynamoDB's per-partition throughput limits (~1,000 WCU/sec), causing throttling that degrades service for that entity — and potentially co-located entities in the same partition. Version 0.10.1 fixes the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00267 18th percentileScored 2026-11-07
Fix Fixed zae-limiter (zeroae): 0.10.1zae-limiter (PyPI): 0.10.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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
zeroaezae-limiterbefore 0.10.10.10.1Patch availableCNA
—zae-limiter (PyPI)before 0.10.10.10.1Patch availableGHSA-76rv-2r9v-c5m6
  • zae-limiter Vendorzeroae Affected before 0.10.1 Fixed in 0.10.1 Patch available CNA
  • zae-limiter (PyPI) Vendor— Affected before 0.10.1 Fixed in 0.10.1 Patch available GHSA-76rv-2r9v-c5m6

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:zeroae:zae-limiter:*:*:*:*:*:*:*:*before 0.10.1Vulnerablezeroae
  • cpe:2.3:a:zeroae:zae-limiter:*:*:*:*:*:*:*:* Versions before 0.10.1 Vulnerable ·zeroae

Remediation

  • Fix · CNA zae-limiter (zeroae) Fixed in 0.10.1
  • Fix · GHSA-76rv-2r9v-c5m6 zae-limiter (PyPI) Fixed in 0.10.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27695
  2. 2026-10-03 Alias added: GHSA-76rv-2r9v-c5m6

References

Advisory 2

Other 3

Sources

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