VulnSocial

CVE-2020-17518(apache / flink)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Apache Flink 1.5.1 introduced a REST handler that allows you to write an uploaded file to an arbitrary location on the local file system, through a maliciously modified HTTP HEADER. The files can be written to any location accessible by Flink 1.5.1. All users should upgrade to Flink 1.11.3 or 1.12.0 if their Flink instance(s) are exposed. The issue was fixed in commit a5264a6f41524afe8ceadf1d8ddc8c80f323ebc4 from apache/flink:master.

apache CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-23CWE-22

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • flink

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Affected systems

Vendors
apache
Products
flink

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-10-29: 110-29
Referenced assets1 URL
Full discourse1 post
  • NewNormal Security@NewScanTeam

    NewNormal Security turns CVEs since the previous batch into new detections, every day. 𝗗𝗮𝗶𝗹𝘆 𝗖𝗩𝗘 𝗥𝗲𝗽𝗼𝗿𝘁 — 29 Oct 2026 𝗔𝗱𝗱𝗲𝗱 to NewScan 𝘁𝗼𝗱𝗮𝘆: 🚨 BI dashboard on the vendor's default signing key, or a metadata store that executes what it holds — forge an admin session, then run code (Apache Superset CVE-2023-27524, CVE-2023-37941) 🚨 Unauthenticated cluster dashboard reading and writing files outside its directory — read its credentials, or write a file anywhere (Apache Flink CVE-2020-17519, CVE-2020-17518) 🔎 Java message broker fingerprinting — now identified from its own login prompt, which is what makes advisories against it matchable (Apache ActiveMQ) Test your stack with NewScan — free, self-hosted: https://newnormalsecurity.com/newscan?utm_source=x&utm_medium=social&utm_campaign=daily-cve #infosec #AppSec #AuthBypass #CSO #REDTEAM

    000003
    6 followersView on X
CPE platform detail1 entries

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PartVendorProductVersionTarget SWTarget HW
Appapacheflink---

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