GHSA-6v2p-p543-phr9 CVE-2025-22868 GO-2025-3488
golang.org/x/oauth2 Improper Validation of Syntactic Correctness of Input vulnerability
- Severity
- 7.5 / 10
- High · CVSS 3.1
- Exploit chance (EPSS)
- 0.87%
- Chance of exploitation in the next 30 days. Higher than 58.81% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-1286 Improper Validation of Syntactic Correctness of Input
- Fix
0.27.0- Upgrade golang.org/x/oauth2 to this version or later
Description
An attacker can pass a malicious malformed token which causes unexpected memory to be consumed during parsing.
Affected versions
Go
| Package | Vulnerable | Fixed in |
|---|---|---|
| golang.org/x/oauth2 | < 0.27.0 |
0.27.0 |
| golang.org/x/oauth2 | < 0.27.0 |
0.27.0 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
golang.org/x/oauth2 Go → 0.27.0
- go
go get golang.org/x/oauth2@v0.27.0 && go mod tidy
Severity breakdown
CVSS 3.1 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Weakness
CWE-1286: Improper Validation of Syntactic Correctness of Input
The product receives input that is expected to be well-formed - i.e., to comply with a certain syntax - but it does not validate or incorrectly validates that the input complies with the syntax.
How to prevent it
- Implementation: Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does. When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue." Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
References
Advisories
Other links
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| EEF-CVE-2026-105660 Unvalidated HTTP/1 request-target authority lets a client choose conn.host and conn.port in Bandit | Not rated yet | Same weakness, CWE-1286 |
| GHSA-f52w-8j3h-j724 Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging | High | Same weakness, CWE-1286 |
| GHSA-6h8r-xr42-gp59 xmldom: Parser silently accepts a not-well-formed end tag whose name is followed by a line break and trailing content | Medium | Same weakness, CWE-1286 |
| GHSA-g2pf-xv49-m2h5 Rack::Request accepts invalid Host characters, enabling host allowlist bypass | Medium | Same weakness, CWE-1286 |
| GHSA-pq2q-rcw4-3hr6 NATS: Pre-auth remote server crash via WebSocket frame length overflow in wsRead | High | Same weakness, CWE-1286 |
| GHSA-vprv-35vv-q339 NATS has pre-auth server panic via leafnode handling | High | Same weakness, CWE-1286 |
| GO-2026-4601 Incorrect parsing of IPv6 host literals in net/url | High | Same weakness, CWE-1286 |
| GHSA-cjfx-qhwm-hf99 FacturaScripts has SQL Injection in API ORDER BY Clause | High | Same weakness, CWE-1286 |
Credits: jub0bs
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