Vulnerability · Published Feb 25, 2026 · Assigned by GitHub_M
CVE-2026-27695zae-limiter: DynamoDB hot partition throttling enables per-entity Denial of Service
Medium 4.3
In plain English
A medium-severity resource allocation without limits in zae-limiter from zeroae. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | zae-limiter | 0.10.1 | GHSA-76rv-2r9v-c5m6 |
| PyPI | zae-limiter | 0.10.1 | PYSEC-2026-3434 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| zeroae | zae-limiter | < 0.10.1 |
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
References
- https://github.com/zeroae/zae-limiter/security/advisories/GHSA-76rv-2r9v-c5m6 x_refsource_CONFIRM
- https://github.com/zeroae/zae-limiter/releases/tag/v0.10.1 x_refsource_MISC