CVE-2021-46877

Exp

jackson-databind 2.10.x through 2.12.x before 2.12.6 and 2.13.x before 2.13.1 allows attackers to cause a denial of service (2 GB transient heap usage per read) in uncommon situations involving JsonNode JDK serialization.

Published: 2023-03-18 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-46877 is rated High Exploit Risk (67.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.12%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2021-46877

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-46877

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 0.26% 1.12% +0.86%
2 2026-03-04 0.13% 0.26% +0.13%
3 2026-03-01 — 0.13% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-46877

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/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]
7.5 3.1 HIGH
CVSS:3.1/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 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2021-46877

GitHub Security Advisory for CVE-2021-46877

GHSA-3x8x-79m2-3w2w · Severity: high · Ecosystem: maven — jackson-databind possible Denial of Service if using JDK serialization to serialize JsonNode

OS Trackers for CVE-2021-46877

vendor priority summary link
debian not yet assigned CVE-2021-46877 not yet assigned priority: Debian including 1 source packages (jackson-databind), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. https://security-tracker.debian.org/tracker/CVE-2021-46877
redhat medium — https://access.redhat.com/security/cve/CVE-2021-46877
suse medium CVE-2021-46877 severity moderate: SUSE including 2 source package names (jackson-databind, jackson-databind-javadoc), 24 product×package rows across 15 product lines (SUSE Enterprise Storage 7, SUSE Enterprise Storage 7.1, … (15 product lines)): Known Not Affected 24. https://www.suse.com/security/cve/CVE-2021-46877/
ubuntu medium CVE-2021-46877 medium priority: Ubuntu including 1 source packages (jackson-databind), 13 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 10, needed 2, released 1. https://ubuntu.com/security/CVE-2021-46877

Affected software / configurations for CVE-2021-46877

Vendor Product Version Raw CPE
fasterxml jackson-databind >= 2.10.0, < 2.12.6 cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:*
fasterxml jackson-databind 2.13.0 cpe:2.3:a:fasterxml:jackson-databind:2.13.0:-:*:*:*:*:*:*
fasterxml jackson-databind 2.13.0 cpe:2.3:a:fasterxml:jackson-databind:2.13.0:rc1:*:*:*:*:*:*
fasterxml jackson-databind 2.13.0 cpe:2.3:a:fasterxml:jackson-databind:2.13.0:rc2:*:*:*:*:*:*

References for CVE-2021-46877

URL Tags
https://github.com/FasterXML/jackson-databind/issues/3328 Exploit Issue Tracking Vendor Advisory
https://groups.google.com/g/jackson-user/c/OsBsirPM_Vw Mailing List Release Notes
cvelogic Threat Intelligence