Public proof of conceptFix available

CVE-2023-23638

Q: Is CVE-2023-23638 actively exploited?

Active exploitation of CVE-2023-23638 has not been confirmed. Its EPSS score was 4.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2023-23638?

CVE-2023-23638 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

A public proof of concept exists; no exploitation attested.

Published2023-03-08
WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A deserialization vulnerability existed when dubbo generic invoke, which could lead to malicious code execution. This issue affects Apache Dubbo 2.7.x version 2.7.21 and prior versions; Apache Dubbo 3.0.x version 3.0.13 and prior versions; Apache Dubbo 3.1.x version 3.1.5 and prior versions.

Timeline

dates in UTC

2023-03-0811:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-23638?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-23638?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Apache dubbo

Branch	Affected	Fixed in	Source
2.7	≥ 2.7.0, ≤ 2.7.21	no fix published	NVD
3.0	≥ 3.0.0, ≤ 3.0.13	no fix published	NVD
3.1	≥ 3.1.0, ≤ 3.1.5	no fix published	NVD

dubbo

Branch	Affected	Fixed in	Source
3.1	≥ 3.1.0, < 3.1.5	3.1.5	OSV
3.0	≥ 3.0.0, < 3.0.13	3.0.13	OSV
2.7	< 2.7.22	2.7.22	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

lists.apache.orgVendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 4 repositories, unverifiedX1r0z/dubbo-rceYYHYlh/Apache-Dubbo-CVE-2023-23638-expP4x1s/CVE-2023-23638-Toolscuijiung/dubbo-CVE-2023-23638

Sources

CISA-ADPSSVC decisionnone2024-10-23
OpenCVESSVC decisionnone—
CNACVSS 3.15read 2026-10-23
NVDCVSS 3.19.8read 2026-10-23
CNAweakness (CWE)CWE-502read 2026-10-23
FIRST EPSSEPSS score4.8 %2026-10-22
PoC-in-GitHubproof of concept4read 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2023-03-08
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-23638?

Is CVE-2023-23638 actively exploited?

Active exploitation of CVE-2023-23638 has not been confirmed. Its EPSS score was 4.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-23638?

CVE-2023-23638 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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