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SCA: security update for org.apache.logging.log4j:log4j-api (GHSA-qv9r-c865-cp47)

medium Tenable Cloud Security Plugin ID 445957

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Improper encoding of non-finite floating-point values during MapMessage JSON serialization in Apache Log4j
 API produces output that is not valid JSON. This issue affects Apache Log4j API versions 2.13.1 through
 2.25.4 and version 2.26.0. The fix for CVE-2026-34481 did not cover all code paths: when a MapMessage
 contains a non-finite IEEE 754 value (NaN, Infinity, or -Infinity), MapMessage.asJson() emits the
 corresponding bare token. RFC 8259 does not permit these tokens, so a conformant parser rejects the
 resulting document. The defect is reachable only when both of the following conditions hold: * The
 application uses the message resolver https://logging.apache.org/log4j/2.x/manual/json-template-
 layout.html#event-template-resolver-message of JsonTemplateLayout or any other layout that relies on
 MapMessage.asJson() or MapMessage.getFormattedMessage(new String[]{"JSON"}). * The application logs a
 MapMessage that contains an attacker-controlled floating-point value. An attacker who can supply a non-
 finite value can cause the affected layout to emit malformed JSON, which may corrupt the enclosing log
 record or disrupt downstream log ingestion and parsing. Users are advised to upgrade to Apache Log4j API
 2.25.5 or 2.26.1, both of which emit RFC 8259-compliant JSON for non-finite values. (CVE-2026-49844)

Solution

Update the org.apache.logging.log4j:log4j-api library and its related packages to version 2.25.5 or later.

See Also

https://github.com/advisories/GHSA-qv9r-c865-cp47

Plugin Details

Severity: Medium

ID: 445957

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 8/13/2026

Updated: 8/13/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.72

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:C/A:N

CVSS Score Source: CVE-2026-49844

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.3

Threat Score: 1.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/11/2026

Vulnerability Publication Date: 7/10/2026

Reference Information

CVE: CVE-2026-49844

cwe: CWE-116