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CVE-2025-13836 is a denial-of-service vulnerability in an HTTP client/library's response-reading behavior. When the client reads an HTTP response without an explicitly specified read amount, it defaults to using the server-supplied Content-Length value to determine how much data to read. Because Content-Length is attacker-controlled when communicating with a malicious or compromised server, this behavior can cause the client to allocate or read excessively large amounts of data into memory. The issue therefore allows a malicious server to trigger unbounded or insufficiently bounded memory consumption during response handling, potentially leading to out-of-memory conditions or process instability.
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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.
18 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.