Loading vulnerability…
CVE-2021-31525 is a denial-of-service vulnerability in the Go standard library net/http package before Go 1.15.12 and Go 1.16.4. ReadRequest and ReadResponse can encounter an unrecoverable panic while parsing exceptionally large HTTP headers. The vulnerable parsing path is reachable through Connection-header processing in the standard library; related golang.org/x/net paths can be reached through Connection or Upgrade-header processing. It affects Go HTTP clients, including applications using net/http Transport or Client, and potentially Go HTTP servers configured with an unsafe Server.MaxHeaderBytes value.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
24 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Go net/http denial-of-service flaw in which processing a very large HTTP header can panic ReadRequest or ReadResponse.
A Go net/http flaw in which processing a very large header in ReadRequest or ReadResponse can cause a panic.
A Go net/http vulnerability in which processing a very large HTTP header can cause ReadRequest or ReadResponse to panic.
A denial-of-service flaw in Go net/http where ReadRequest and ReadResponse can panic while reading a very large header.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.