How severe is CVE-2026-29856?

CVE-2026-29856 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-29856 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-29856?

CVE-2026-29856 affects Aapanel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-29856?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-29856 have an EU (EUVD) identifier?

Yes. CVE-2026-29856 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12862.

When was CVE-2026-29856 published?

CVE-2026-29856 was published on 2026-03-18 and last updated on 2026-06-17.

CVE-2026-29856

CVE-2026-29856 is a high-severity vulnerability in Aapanel with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12862
Weakness: CWE-400
Affected product: Aapanel
Published: 2026-03-18
Last modified: 2026-06-17

Description

An issue in the VirtualHost configuration handling/parser component of aaPanel v7.57.0 allows attackers to cause a Regular Expression Denial of Service (ReDoS) via a crafted input.

Frequently asked questions

What is CVE-2026-29856?: An issue in the VirtualHost configuration handling/parser component of aaPanel v7.57.0 allows attackers to cause a Regular Expression Denial of Service (ReDoS) via a crafted input.
How severe is CVE-2026-29856?: CVE-2026-29856 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-29856 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-29856?: CVE-2026-29856 affects Aapanel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-29856?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-29856 have an EU (EUVD) identifier?: Yes. CVE-2026-29856 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12862.
When was CVE-2026-29856 published?: CVE-2026-29856 was published on 2026-03-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:aapanel:aapanel:7.57.0:*:*:*:*:*:*:*

More vulnerabilities in Aapanel

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CVE-2026-29858 — High (CVSS 7.5): A lack of path validation in aaPanel v7.57.0 allows attackers to execute a local file inclusion (LFI), leadingot…
CVE-2020-14421 — High (CVSS 7.2): aaPanel through 6.6.6 allows remote authenticated users to execute arbitrary commands via the Script Content box on the…
CVE-2024-42922 — Medium (CVSS 6.5): AAPanel v7.0.7 was discovered to contain an OS command injection vulnerability.

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