# AWS Security Token Service

Published articles for AWS Security Token Service.

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## AWS STS simplifies session token size limits and adds session token size monitoring

DevFeed: [AWS STS simplifies session token size limits and adds session token size monitoring](<https://devfeed.tech/articles/aws-sts-simplifies-session-token-size-limits-and-adds-session-token-size-monitoring-26907.md>)

Original publisher: [Read original article](<https://aws.amazon.com/blogs/security/aws-sts-simplifies-session-token-size-limits-and-adds-session-token-size-monitoring/>)

Author: Rishi Tripathy

Published: 2026-09-15T22:21:59Z

Content type: release

Language: en

Sources: [AWS Security Blog](<https://devfeed.tech/sources/aws-security-blog.md>)

Topics: [Amazon Web Services](<https://devfeed.tech/topics/aws.md>), [Security](<https://devfeed.tech/topics/security.md>), [Monitoring](<https://devfeed.tech/topics/monitoring.md>), [Amazon CloudWatch](<https://devfeed.tech/topics/amazon-cloudwatch.md>), [AWS CloudTrail](<https://devfeed.tech/topics/aws-cloudtrail.md>), [API](<https://devfeed.tech/topics/api.md>)

Tags: [advanced-300](<https://devfeed.tech/tags/advanced-300.md>), [amazon-cloudwatch](<https://devfeed.tech/tags/amazon-cloudwatch.md>), [apis](<https://devfeed.tech/tags/apis.md>), [aws](<https://devfeed.tech/tags/aws.md>), [aws-cloudtrail](<https://devfeed.tech/tags/aws-cloudtrail.md>), [aws-security-token-service](<https://devfeed.tech/tags/aws-security-token-service.md>), [aws-sts](<https://devfeed.tech/tags/aws-sts.md>), [infrastructure](<https://devfeed.tech/tags/infrastructure.md>), [metrics](<https://devfeed.tech/tags/metrics.md>), [monitoring](<https://devfeed.tech/tags/monitoring.md>), [security](<https://devfeed.tech/tags/security.md>), [security-blog](<https://devfeed.tech/tags/security-blog.md>), [security-identity-compliance](<https://devfeed.tech/tags/security-identity-compliance.md>), [technical-how-to](<https://devfeed.tech/tags/technical-how-to.md>), [token](<https://devfeed.tech/tags/token.md>)

### AI overview

AWS Security Token Service has replaced its separate packed policy and overall session token limits with a single 4,096-byte limit. It now reports session token size and limit utilization in API responses, Amazon CloudWatch metrics, and AWS CloudTrail events.

### Source excerpt

AWS Security Token Service (AWS STS) has simplified session token size limits, giving you more room for your session policies and session tags. STS has replaced the packed policy size and the overall session token size limits with a single token size limit of 4,096 bytes. STS now reports session token size in API responses, [...]