Jenkins up to 2.554.x config.xml deserialization

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.85

Summaryinfo

A vulnerability was found in Jenkins up to 2.554.x. It has been declared as critical. Impacted is an unknown function of the file config.xml. Such manipulation leads to deserialization. This vulnerability is documented as CVE-2026-53435. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Jenkins up to 2.554.x and classified as critical. Affected by this issue is some unknown processing of the file config.xml. The manipulation with an unknown input leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In Jenkins 2.567 and earlier, LTS 2.555.2 and earlier, it is possible for attackers to have Jenkins deserialize arbitrary types defined in Jenkins core or plugins from an attacker-controlled `config.xml` submission in a way that allows them to handle HTTP requests afterwards. This can be used to impersonate any user and send HTTP requests on their behalf, up to and including use of the Script Console to run arbitrary code, or to read arbitrary files from the Jenkins controller.

The advisory is available at jenkins.io. This vulnerability is handled as CVE-2026-53435 since 06/09/2026. The exploitation is known to be easy. The attack may be launched remotely. Technical details are known, but there is no available exploit.

By approaching the search of inurl:config.xml it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 2.555.x eliminates this vulnerability.

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Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Google Hack: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Jenkins 2.555.x

Timelineinfo

06/09/2026 CVE reserved
06/10/2026 +1 days Advisory disclosed
06/10/2026 +0 days VulDB entry created
06/10/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: jenkins.io
Status: Confirmed

CVE: CVE-2026-53435 (🔒)
GCVE (CVE): GCVE-0-2026-53435
GCVE (VulDB): GCVE-100-370166

Entryinfo

Created: 06/10/2026 15:41
Changes: 06/10/2026 15:41 (54)
Complete: 🔍
Cache ID: 216::103

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