CVE-2026-57487High· 7.5▾ TwilightA flaw was found in libupnp. The HTTP parser fails to enforce configured message size limits when processing chunked transfer-encoded HTTP requests. A remote attacker can exploit this vulnerability by sending an excessively large chunked p…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the vendor's CSAF advisory record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 17.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.3%
Last analysed / modified upstream
0.3% → 0.4%
A flaw was found in libupnp. The HTTP parser fails to enforce configured message size limits when processing chunked transfer-encoded HTTP requests. A remote attacker can exploit this vulnerability by sending an excessively large chunked payload, forcing the application to buffer data beyond intended boundaries. This issue leads to memory exhaustion and a Denial of Service (DoS).
libupnp: libupnp: Denial of Service via oversized chunked HTTP requests. Released 2026-10-16, updated 2026-10-21.
Not affected:
Refer to the advisory for fix availability.
Connected by shared product, vendor, weakness, or advisory.
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