CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, без вход и след действие от потребителя.
Описание
Оригинално описание
isomorphic-git is a pure JavaScript implementation of Git for Node.js and browsers. Prior to 1.38.6, isomorphic-git reads a server-controlled targetSize while applying a packfile delta in src/utils/applyDelta.js and passes it without a bound to Buffer.alloc(targetSize). A malicious or man-in-the-middle-controlled remote can send one delta header that causes git.clone() or git.fetch() to allocate approximately 2 GB before validating the actual delta output. GitPackIndex.fromPack swallows the later size-mismatch error, so a host with sufficient memory may retain the resource waste without a visible failure, while containers, serverless functions, and small virtual machines may terminate. Node.js heap limits do not mitigate the off-heap Buffer allocation. This issue is fixed in version 1.38.6.
Засегнати продукти
- isomorphic-git isomorphic-git: < 1.38.6
Вид слабост
История
- 3 ноември 2026 Публикувано
Други уязвимости в isomorphic-git isomorphic-git
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-63476
- https://nvd.nist.gov/vuln/detail/CVE-2026-63476
- https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-9x82-4j54-863h
- https://github.com/isomorphic-git/isomorphic-git/pull/2370
- https://github.com/isomorphic-git/isomorphic-git/commit/823843d1cd19182df79bc907c767f5bcecb39a0b
- https://github.com/isomorphic-git/isomorphic-git/releases/tag/v1.38.6