Detections
Analytics

Echo: com.fasterxml.jackson.core:jackson-core, tools.jackson.core:jackson-core: security update to 2.18.11

high Tenable Self-Hosted Container Security Plugin ID 471598

Description

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

 - NumberInput.looksLikeValidNumber() in FasterXML jackson-core pre-validates "stringified numbers" with two
 regular expressions: PATTERN_FLOAT ([+-]?[0-9]*[\.]?[0-9]+([eE][+-]?[0-9]+)?), present since 2.17.0, and
 PATTERN_FLOAT_TRAILING_DOT, added in 2.17.2. PATTERN_FLOAT places adjacent quantifiers over the same
 character class -- an optional [0-9]* run, an optional dot, then a required [0-9]+ run -- so input that
 ultimately fails to match forces Java's backtracking engine to retry every possible split point of the
 digit run. Matching cost therefore grows with the square of the input length. An attacker who can supply
 JSON that an application deserializes into a numeric target type reaches this method through jackson-
 databind's default String-to-number coercion (StdDeserializer and NumberDeserializers for BigDecimal,
 BigInteger, Double and Float). Because StreamReadConstraints.maxStringLength defaults to 20,000,000
 characters, no constraint bounds the input before it reaches the regex. Testing by the reporter confirmed
 O(n^2) growth across five consecutive input-size doublings, with a single 160,000-character string
 consuming roughly 74 seconds in one call; a small number of concurrent requests of ordinary body size can
 therefore exhaust a server's request-handling thread pool. The affected method does not exist before
 2.17.0, so 2.16.x and earlier releases are not affected. The fix replaces both regular expressions with a
 hand-rolled single-pass scan. (CVE-2026-89407)

Solution

Update the com.fasterxml.jackson.core:jackson-core library and its related packages to version 2.18.11 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-89407

Plugin Details

Severity: High

ID: 471598

Version: Revision 1.3

Type: Local

Published: 10/3/2026

Updated: 10/13/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.63

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-89407

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/2/2026

Vulnerability Publication Date: 9/22/2026

Reference Information

CVE: CVE-2026-89407