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GO-2025-4012Published

Lack of limit when parsing cookies can cause memory exhaustion in net/http

Exact source revision recorded 24 Oct 2026 13:19:41 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

osv · GO-2025-4012

Published

Despite HTTP headers having a default limit of 1MB, the number of cookies that can be parsed does not have a limit. By sending a lot of very small cookies such as "a=;", an attacker can make an HTTP server allocate a large amount of structs, causing large memory consumption.

Source published
29 Oct 2025 21:50:05 UTC
Source modified
15 May 2026 10:59:23 UTC
Observed here
24 Oct 2026 13:19:41 UTC
Source terms
OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.

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Sources read 10 Nov 11:34 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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