chore(deps): update dependency @babel/core to v7.29.6 [security] by backstage-goalie[bot] · Pull Request #9807 · backstage/community-plugins

backstage-goalie · 2026-07-16T00:30:44Z

This PR contains the following updates:

Package	Change	Age	Confidence
@babel/core (source)	`7.28.5` → `7.29.6`

Warning

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@babel/core: Arbitrary File Read via sourceMappingURL Comment

CVE-2026-49356 / GHSA-4x5r-pxfx-6jf8

More information

Details

Impact

Using @babel/core to compile maliciously crafted code can allow ab attacker to read any source map from the system that is running Babel, if these conditions are all true:

the attacker controls the input source code
the attacker can read the output source code
the attacker knows the path of the source map file that they want to read

Users that only compile trusted code are not impacted.

Patches

The vulnerability has been fixed in @babel/core@7.29.6 and @babel/core@8.0.0-rc.6.

Workarounds

Callers can mitigate the issue without upgrading by setting inputSourceMap: false in their Babel options.

Callers can also manually extract the #sourceMappingURL comment from the input source code, validate whether the source map that it links to is allowed to be read, and if it is pass an object to inputSourceMap (passing false when it's not).

Credits

Thanks Teodor-Cristian Radoi for reporting the vulnerability.

Severity

CVSS Score: 3.2 / 10 (Low)
Vector String: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

References

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

Release Notes

babel/babel (@babel/core)

`v7.29.6`

Compare Source

v7.29.6 (2026-05-25)

🐛 Bug Fix

babel-generator
- #18014 Catchup source map position in preserveFormat (@nicolo-ribaudo)
babel-core
- #18001 [7.x packport]Improve input source map handling (@JLHwung)
babel-core, babel-generator
- #17998 Preserve original identifier names from input sourcemaps (#17992) (@Andarist)

Committers: 3

Huáng Jùnliàng (@JLHwung)
Mateusz Burzyński (@Andarist)
Nicolò Ribaudo (@nicolo-ribaudo)

`v7.29.0`

Compare Source

v7.29.0 (2026-01-31)

Thanks @simbahax for your first PR!

🚀 New Feature

babel-types
- #17750 [7.x backport] Add attributes import declaration builder (@JLHwung)
babel-standalone
- #17663 [7.x backport] feat(standalone): export async transform (@JLHwung)
- #17725 [7.x backport] feat: read standalone targets from data-targets (@JLHwung)

🐛 Bug Fix

babel-parser
- #17765 fix(parser): correctly parse type assertions in extends clause (@nicolo-ribaudo)
- #17723 [7.x backport] fix(parser): improve super type argument parsing (@JLHwung)
babel-traverse
- #17708 fix(traverse): provide a hub when traversing a File or Program and no parentPath is given (@simbahax)
babel-plugin-transform-block-scoping, babel-traverse
- #17737 [7.x backport] fix: Rename switch discriminant references when body creates shadowing variable (@magic-akari)

🏃‍♀️ Performance

babel-generator, babel-runtime-corejs3
- #17642 [Babel 7] Improve generator performance (@liuxingbaoyu)

Committers: 6

David (@simbahax)
Huáng Jùnliàng (@JLHwung)
Nicolò Ribaudo (@nicolo-ribaudo)
@liuxingbaoyu
@magic-akari

`v7.28.6`

Compare Source

v7.28.6 (2026-01-12)

Thanks @kadhirash and @kolvian for your first PRs!

🐛 Bug Fix

babel-cli, babel-code-frame, babel-core, babel-helper-check-duplicate-nodes, babel-helper-fixtures, babel-helper-plugin-utils, babel-node, babel-plugin-transform-flow-comments, babel-plugin-transform-modules-commonjs, babel-plugin-transform-property-mutators, babel-preset-env, babel-traverse, babel-types
- #17589 Improve Unicode handling in code-frame tokenizer (@JLHwung)
babel-plugin-transform-regenerator
- #17556 fix: transform-regenerator correctly handles scope (@liuxingbaoyu)
babel-plugin-transform-react-jsx
- #17538 fix: Keep jsx comments (@liuxingbaoyu)

💅 Polish

babel-core, babel-standalone
- #17606 Polish(standalone): improve message on invalid preset/plugin (@JLHwung)

🏠 Internal

babel-plugin-bugfix-v8-static-class-fields-redefine-readonly, babel-plugin-proposal-decorators, babel-plugin-proposal-import-attributes-to-assertions, babel-plugin-proposal-import-wasm-source, babel-plugin-syntax-async-do-expressions, babel-plugin-syntax-decorators, babel-plugin-syntax-destructuring-private, babel-plugin-syntax-do-expressions, babel-plugin-syntax-explicit-resource-management, babel-plugin-syntax-export-default-from, babel-plugin-syntax-flow, babel-plugin-syntax-function-bind, babel-plugin-syntax-function-sent, babel-plugin-syntax-import-assertions, babel-plugin-syntax-import-attributes, babel-plugin-syntax-import-defer, babel-plugin-syntax-import-source, babel-plugin-syntax-jsx, babel-plugin-syntax-module-blocks, babel-plugin-syntax-optional-chaining-assign, babel-plugin-syntax-partial-application, babel-plugin-syntax-pipeline-operator, babel-plugin-syntax-throw-expressions, babel-plugin-syntax-typescript, babel-plugin-transform-async-generator-functions, babel-plugin-transform-async-to-generator, babel-plugin-transform-class-properties, babel-plugin-transform-class-static-block, babel-plugin-transform-dotall-regex, babel-plugin-transform-duplicate-named-capturing-groups-regex, babel-plugin-transform-explicit-resource-management, babel-plugin-transform-exponentiation-operator, babel-plugin-transform-json-strings, babel-plugin-transform-logical-assignment-operators, babel-plugin-transform-nullish-coalescing-operator, babel-plugin-transform-numeric-separator, babel-plugin-transform-object-rest-spread, babel-plugin-transform-optional-catch-binding, babel-plugin-transform-optional-chaining, babel-plugin-transform-private-methods, babel-plugin-transform-private-property-in-object, babel-plugin-transform-regexp-modifiers, babel-plugin-transform-unicode-property-regex, babel-plugin-transform-unicode-sets-regex
- #17580 Allow Babel 8 in compatible Babel 7 plugins (@nicolo-ribaudo)

🏃‍♀️ Performance

babel-plugin-transform-react-jsx
- #17555 perf: Use lighter traversal for jsx __source,__self (@liuxingbaoyu)

Committers: 7

Babel Bot (@babel-bot)
Eliot Pontarelli (@kolvian)
Huáng Jùnliàng (@JLHwung)
Kadhirash Sivakumar (@kadhirash)
Nicolò Ribaudo (@nicolo-ribaudo)
@liuxingbaoyu
coderaiser (@coderaiser)

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