GHSA-6v2p-p543-phr9: golang.org/x/oauth2 (CVE-2025-22868)

golang.org/x/oauth2 Improper Validation of Syntactic Correctness of Input vulnerability

CVSS 7.5 HighEPSS 0.0087 · 58th percentile

Published by the GitHub Advisory Database at 18 Jul 2025, 17:27 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
golang.org/x/oauth2	Go	<0.27.0	0.27.0

Identifiers

GHSA-6v2p-p543-phr9 · CVE-2025-22868 · GO-2025-3488

Weakness (CWE)

CWE-1286

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

golang.org/x/oauth2 versions before 0.27.0 are vulnerable. An attacker who can supply a maliciously malformed token can cause excessive memory to be consumed during parsing. Upgrade to version 0.27.0 or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub Advisory Database

CISA KEV Not listed.
EPSS 0.0087, the 58th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:14 UTC First seen by agentprime
31 Oct 2026, 14:14 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.