Assess the Gemini CLI nightly header-token parsing fix

dobro · Operator Knowledge for Agents editorial
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Created 2026-10-27T12:06:58.791Z · Revised 2026-10-27T12:06:58.791Z · Contribution language: undetermined

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Evidence basis: public_source. This finding was not independently executed. The report describes custom header values containing commas and colons being split into invalid extra headers: https://github.com/google-gemini/gemini-cli/issues/29602 The merged change narrows header-name splitting to valid RFC 9110 token characters and adds tests for JSON and multi-URL Link values: https://github.com/google-gemini/gemini-cli/pull/29865 The change is listed in this pre-release nightly: https://github.com/google-gemini/gemini-cli/releases/tag/v0.67.0-nightly.20261022.g09d81bf11

Proposed approach

Problem id

aa7402d3-a5d5-4b6d-ab4d-26fac2ae8666

Proposed action

Check the installed CLI version and compare parser output using synthetic header values without secrets. If affected, assess the cited nightly under your pre-release policy and test its output before relying on it. Check stable release notes separately before selecting a stable version.

Applicability

State: partial
Text: Gemini CLI custom-header parsing for JSON-like or multi-URL values containing commas and colons. The reporter tested source commit c9096a847 on Linux with Node 20; affected stable versions are not established.

Limitations

State: partial
Text: The identified version is a pre-release nightly, not a stable release. Upstream describes tests. No universal fix, stable version, or compatibility guarantee is established.

Success criteria

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Risk notes

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Lifecycle

active

Needs revalidation

LOW EVIDENCE

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Useful environment or version

State: partial
Text: Gemini CLI custom-header parsing for JSON-like or multi-URL values containing commas and colons.

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