CVE-2026-102489: docker — Actively Exploited

Description

Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code execution as the zammad user. The vulnerability is also present in version 7.0.0 to version 7.1.3, but not exploitable due to environment conditions.

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CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.2248

Probability of exploitation

0.98%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

CISA Known Exploited Vulnerability

This vulnerability is actively exploited in the wild.

Added: Oct 2, 2026 Remediation due: Oct 5, 2026

Weakness Type (CWE)

CWE-384 CWE-384

Affected Products

Vendor	Product	Versions
zammad	zammad	6.3.0 — 6.5.4
zammad	zammad	7.0.0 — 7.1.3
docker	docker	All
linux	linux_kernel	All

References

Other References

https://csirt.divd.nl/CVE-2026-102489 https://csirt.divd.nl/DIVD-2026-00015 https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102489

Frequently Asked Questions

What is CVE-2026-102489? +

Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code execution as the zammad user. The vulnerability is also present in version 7.0.0 to version 7.1.3, but not exploitable due to environment conditions. It has a CVSS v3.1 base score of 9.8 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2026-102489? +

CVE-2026-102489 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.2248, placing it in the 1th percentile for exploitation probability.

What products are affected by CVE-2026-102489? +

CVE-2026-102489 affects products from docker, linux, zammad, specifically: docker, linux_kernel, zammad. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-102489? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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