CVE-2019-1010083

The Pallets Project Flask before 1.0 is affected by: unexpected memory usage. The impact is: denial of service. The attack vector is: crafted encoded JSON data. The fixed version is: 1. NOTE: this may overlap CVE-2018-1000656.

Published: 2019-07-17 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-1010083 is rated Moderate Risk (58.3/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.88%). EPSS rose +1.42% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-1010083

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.47% 1.88% +1.42%
2 2026-05-06 0.40% 0.47% +0.07%
3 2026-01-25 — 0.40% —

Full EPSS history (15 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-1010083

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2019-1010083

GitHub Security Advisory for CVE-2019-1010083

GHSA-5wv5-4vpf-pj6m · Severity: high · Ecosystem: pip — Pallets Project Flask is vulnerable to Denial of Service via Unexpected memory usage

OS Trackers for CVE-2019-1010083

vendor priority summary link
debian not yet assigned CVE-2019-1010083 not yet assigned priority: Debian including 1 source packages (flask), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-1010083
redhat medium — https://access.redhat.com/security/cve/CVE-2019-1010083
suse high CVE-2019-1010083 severity important: SUSE including 103 source package names (ansible-2.4.6.0-3.9.1, ansible1-1.9.6-7.3.1, …), 224 product×package rows across 8 product lines (HPE Helion OpenStack 8, SUSE Linux Enterprise Module for Basesystem 15, … (8 product lines)): Fixed 218, Known Not Affected 6. https://www.suse.com/security/cve/CVE-2019-1010083/
ubuntu low CVE-2019-1010083 low priority: Ubuntu including 1 source packages (flask), 18 status rows across 18 suites (bionic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 14, released 3, DNE 1. https://ubuntu.com/security/CVE-2019-1010083

Affected software / configurations for CVE-2019-1010083

Vendor Product Version Raw CPE
palletsprojects flask < 1.0 cpe:2.3:a:palletsprojects:flask:*:*:*:*:*:*:*:*

References for CVE-2019-1010083

URL Tags
https://www.palletsprojects.com/blog/flask-1-0-released/ Release Notes Vendor Advisory
cvelogic Threat Intelligence