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@backstage-goalie backstage-goalie bot commented Nov 14, 2025

This PR contains the following updates:

Package Change Age Confidence
js-yaml 4.1.0 -> 4.1.1 age confidence
js-yaml 3.14.1 -> 3.14.2 age confidence

js-yaml has prototype pollution in merge (<<)

CVE-2025-64718 / GHSA-mh29-5h37-fv8m

More information

Details

Impact

In js-yaml 4.1.0, 4.0.0, and 3.14.1 and below, it's possible for an attacker to modify the prototype of the result of a parsed yaml document via prototype pollution (__proto__). All users who parse untrusted yaml documents may be impacted.

Patches

Problem is patched in js-yaml 4.1.1 and 3.14.2.

Workarounds

You can protect against this kind of attack on the server by using node --disable-proto=delete or deno (in Deno, pollution protection is on by default).

References

https://cheatsheetseries.owasp.org/cheatsheets/Prototype_Pollution_Prevention_Cheat_Sheet.html

Severity

  • CVSS Score: 5.3 / 10 (Medium)
  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

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


Release Notes

nodeca/js-yaml (js-yaml)

v4.1.1

Compare Source

Security
  • Fix prototype pollution issue in yaml merge (<<) operator.

Configuration

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This PR has been generated by Renovate Bot.

@backstage-goalie backstage-goalie bot force-pushed the renovate/npm-js-yaml-vulnerability branch from f2b72ca to 43e5d2d Compare November 14, 2025 20:42
@backstage-service backstage-service force-pushed the renovate/npm-js-yaml-vulnerability branch from 43e5d2d to 7cfab4e Compare November 14, 2025 20:42
@backstage-goalie backstage-goalie bot force-pushed the renovate/npm-js-yaml-vulnerability branch from 7cfab4e to e710137 Compare November 14, 2025 22:41
@backstage-goalie backstage-goalie bot changed the title fix(deps): update dependency js-yaml to v4.1.1 [security] chore(deps): update dependency js-yaml to v4.1.1 [security] Nov 14, 2025
@backstage-goalie backstage-goalie bot force-pushed the renovate/npm-js-yaml-vulnerability branch 2 times, most recently from 06d3d87 to da19170 Compare November 15, 2025 00:46
@backstage-goalie backstage-goalie bot changed the title chore(deps): update dependency js-yaml to v4.1.1 [security] fix(deps): update dependency js-yaml to v4.1.1 [security] Nov 15, 2025
@backstage-service backstage-service force-pushed the renovate/npm-js-yaml-vulnerability branch from da19170 to 0ef40b8 Compare November 15, 2025 00:46
@backstage-goalie backstage-goalie bot force-pushed the renovate/npm-js-yaml-vulnerability branch from 0ef40b8 to 6313241 Compare November 16, 2025 13:45
@backstage-service backstage-service force-pushed the renovate/npm-js-yaml-vulnerability branch from 6313241 to b176093 Compare November 16, 2025 13:46
@backstage-goalie backstage-goalie bot force-pushed the renovate/npm-js-yaml-vulnerability branch from b176093 to 49923d9 Compare November 17, 2025 09:42
@backstage-service backstage-service force-pushed the renovate/npm-js-yaml-vulnerability branch from 49923d9 to 2208b4c Compare November 17, 2025 09:42
@backstage-goalie backstage-goalie bot force-pushed the renovate/npm-js-yaml-vulnerability branch from 2208b4c to 5ef7336 Compare November 17, 2025 10:41
@backstage-service backstage-service force-pushed the renovate/npm-js-yaml-vulnerability branch from 5ef7336 to 368e6e3 Compare November 17, 2025 10:42
@backstage-goalie backstage-goalie bot force-pushed the renovate/npm-js-yaml-vulnerability branch from 368e6e3 to fa5956b Compare November 17, 2025 16:45
@backstage-service backstage-service force-pushed the renovate/npm-js-yaml-vulnerability branch from fa5956b to 97407db Compare November 17, 2025 16:45
@backstage-goalie backstage-goalie bot force-pushed the renovate/npm-js-yaml-vulnerability branch from 97407db to 890d905 Compare November 17, 2025 18:42
@backstage-goalie backstage-goalie bot changed the title fix(deps): update dependency js-yaml to v4.1.1 [security] chore(deps): update dependency js-yaml [security] Nov 17, 2025
@backstage-goalie backstage-goalie bot force-pushed the renovate/npm-js-yaml-vulnerability branch 15 times, most recently from 9382f53 to cdbd380 Compare November 20, 2025 14:42
@backstage-goalie backstage-goalie bot force-pushed the renovate/npm-js-yaml-vulnerability branch from cdbd380 to 09f1e1b Compare November 21, 2025 00:47
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3 participants