How severe is GHSA-xvr7-p2c6-j83w?

No CVSS score has been assigned to GHSA-xvr7-p2c6-j83w yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-xvr7-p2c6-j83w?

GHSA-xvr7-p2c6-j83w affects the following packages: github.com/apple/swift-nio-http2 (SwiftURL). Ecosystems affected: SwiftURL.

How do I fix GHSA-xvr7-p2c6-j83w?

Update github.com/apple/swift-nio-http2 to 1.38.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xvr7-p2c6-j83w is resolved across your whole dependency graph.

How do I detect GHSA-xvr7-p2c6-j83w in my SwiftURL dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/apple/swift-nio-http2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-xvr7-p2c6-j83w if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Is GHSA-xvr7-p2c6-j83w actively exploited in the wild?

No public exploit code has been indexed for GHSA-xvr7-p2c6-j83w yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-xvr7-p2c6-j83w published, and has it been updated?

GHSA-xvr7-p2c6-j83w was published on August 13, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 SwiftURL

Not in CISA KEV

swift-nio-http2 affected by HTTP/2 MadeYouReset vulnerabilityGHSA-xvr7-p2c6-j83w

GHSA-xvr7-p2c6-j83w is a security vulnerability in github.com/apple/swift-nio-http2. A fix is available for github.com/apple/swift-nio-http2 — see the affected versions and patch details below.

Published

Aug 13, 2025

Updated

Aug 13, 2025

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Aug 13, 2025 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

📦github.com/apple/swift-nio-http2

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects SwiftURL packages — download data is not available via public APIs for these ecosystems.

Description

The HTTP/2 MadeYouReset vulnerability has a mild effect on swift-nio-http2.

swift-nio-http2 mostly protects against MadeYouReset by using a number of existing denial-of-service prevention patterns that we added in response to the RapidReset vulnerabilities. The result is that servers are not vulnerable to naive attacks based on MadeYouReset, and the naive PoC examples do not affect swift-nio-http2.

However, in 1.38.0 we added some defense-in-depth measures as a precautionary measure that detect clients behaving "weirdly". These defense in depth measures tackle resource drain attacks where attackers interleave attack traffic with legitimate traffic to try to evade our existing DoS prevention mechanisms.

We recommend all adopters move to 1.38.0 as soon as possible to mitigate against more sophisticated attacks that may appear in the future.

We are very grateful to @galbarnahum, @AnatBB, and @YanivRL for their reporting and assistance with our process.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦SwiftURL	`github.com/apple/swift-nio-http2`	all versions	1.38.0

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/apple/swift-nio-http2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/apple/swift-nio-http2 to 1.38.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xvr7-p2c6-j83w is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

The HTTP/2 [MadeYouReset vulnerability](https://galbarnahum.com/made-you-reset) has a mild effect on swift-nio-http2. swift-nio-http2 mostly protects against MadeYouReset by using a number of existing denial-of-service prevention patterns that we added in response to the RapidReset vulnerabilities. The result is that servers are not vulnerable to naive attacks based on MadeYouReset, and the naive PoC examples do not affect swift-nio-http2. However, in 1.38.0 we added some defense-in-depth measures as a precautionary measure that detect clients behaving "weirdly". These defense in depth measu

O3 Security · Impact-Aware SCA

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