How severe is GHSA-fc4h-xcf3-qj5f?

No CVSS score has been assigned to GHSA-fc4h-xcf3-qj5f yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-fc4h-xcf3-qj5f?

GHSA-fc4h-xcf3-qj5f affects the following packages: matrix-sdk (crates.io). Ecosystems affected: crates.io.

How do I fix GHSA-fc4h-xcf3-qj5f?

Update matrix-sdk to 0.6.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fc4h-xcf3-qj5f is resolved across your whole dependency graph.

How do I detect GHSA-fc4h-xcf3-qj5f in my crates.io dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for matrix-sdk, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-fc4h-xcf3-qj5f if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is GHSA-fc4h-xcf3-qj5f actively exploited in the wild?

No public exploit code has been indexed for GHSA-fc4h-xcf3-qj5f 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-fc4h-xcf3-qj5f published, and has it been updated?

GHSA-fc4h-xcf3-qj5f was published on October 25, 2022 and was last updated on November 8, 2023. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🦀 crates.io

Not in CISA KEV

matrix-sdk 0.6.0 logs access tokensGHSA-fc4h-xcf3-qj5f

GHSA-fc4h-xcf3-qj5f is a security vulnerability in matrix-sdk. A fix is available for matrix-sdk — see the affected versions and patch details below.

Also known asRUSTSEC-2022-0062

Published

Oct 25, 2022

Updated

Nov 8, 2023

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 8, 2023 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🦀matrix-sdk

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

Description

When sending Matrix requests using an affected version of matrix-sdk in an application that writes logs using tracing-subscriber (in a way that includes fields of tracing spans such as tracing_subscribers default text output from the fmt module), these logs will contain the user's access token.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🦀crates.io	`matrix-sdk`	≥ 0.6.0&&< 0.6.2	0.6.2`cargo update -p matrix-sdk --precise 0.6.2`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for matrix-sdk, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update matrix-sdk to 0.6.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fc4h-xcf3-qj5f is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

When sending Matrix requests using an affected version of `matrix-sdk` in an application that writes logs using `tracing-subscriber` (in a way that includes fields of tracing spans such as `tracing_subscriber`s default text output from the `fmt` module), these logs will contain the user's access token.

O3 Security · Impact-Aware SCA

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