GO-2021-0159 CVE-2015-5739 CVE-2015-5740 CVE-2015-5741
Request smuggling due to improper header parsing in net/http
- Severity
- Not rated yet
- No source has published a CVSS score yet
- Exploit chance (EPSS)
- 9.62%
- Chance of exploitation in the next 30 days. Higher than 95.48% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- —
- Not classified
- Fix
1.4.3- Upgrade stdlib to this version or later
Description
HTTP headers were not properly parsed, which allows remote attackers to conduct HTTP request smuggling attacks via a request that contains Content-Length and Transfer-Encoding header fields.
Affected versions
Go
| Package | Vulnerable | Fixed in |
|---|---|---|
| stdlib | < 1.4.3 |
1.4.3 |
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.
stdlib Go → 1.4.3
- go
go get stdlib@v1.4.3 && go mod tidy
References
Fixes and patches
- go.dev/cl/13148
- go.googlesource.com/go/+/26049f6f9171d1190f3bbe05ec304845cfe6399f
- go.dev/cl/11772
- go.dev/cl/11810
- go.dev/cl/12865
- go.googlesource.com/go/+/117ddcb83d7f42d6aa72241240af99ded81118e9
- go.googlesource.com/go/+/300d9a21583e7cf0149a778a0611e76ff7c6680f
- go.googlesource.com/go/+/c2db5f4ccc61ba7df96a747e268a277b802cbb87
Issue reports
Other links
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-4374-p667-p6c8 HTTP/2 rapid reset can cause excessive work in net/http | High Known exploited | Also affects stdlib |
| CVE-2020-0601 Certificate validation bypass on Windows in crypto/x509 | High Known exploited | Also affects stdlib |
| RUSTSEC-2026-0382 Distrust compromised intermediate certificates in crypto/x509 | Medium | Also affects stdlib |
| GO-2026-6613 HTTP/1 server connection desynchronization after 2xx CONNECT response in net/http | High | Also affects stdlib |
| GO-2026-6609 Lack of limit on size of parsed Range headers in net/http | High | Also affects stdlib |
| GO-2026-6608 Memory limit bypass when parsing MIME headers in net/textproto, mime/multipart | High | Also affects stdlib |
| GO-2026-6607 Reject malformed ECH outer extension references in crypto/tls | High | Also affects stdlib |
| GO-2026-6604 Root.Mkdir(All) can follow junctions out of the root on Windows in os | Critical | Also affects stdlib |
Credits: Jed Denlea, Régis Leroy
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