Allocation of Resources Without Limits or Throttling Affecting credentials-fetcher package, versions <0:2.0.3-1.amzn2023.0.7


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.62% (50th percentile)

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  • Snyk IDSNYK-AMZN2023-CREDENTIALSFETCHER-21700599
  • published25 Oct 2026
  • disclosed8 Oct 2026

Introduced: 8 Oct 2026

NewCVE-2026-78663  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 credentials-fetcher to version 0:2.0.3-1.amzn2023.0.7 or higher.
This issue was patched in ALAS2023-2026-3228.

NVD Description

Note: Versions mentioned in the description apply only to the upstream credentials-fetcher package and not the credentials-fetcher package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

The HTTP/2 server can refund connection-level flow control twice for the same data: Once when a client resets a stream (refunding data for any sent-but-unread portion of the stream), and again when a request handler reads the buffered data. A malicious client can exploit this to bypass the configured connection-level flow control limit (MaxReceiveBufferPerConnection). Total buffered data is still limited by the concurrent stream limit and stream-level flow control.

CVSS Base Scores

version 3.1