CVE-2026-63045VulnerabilityPublished 1 Oct 2026Updated 9 Nov 2026

Apache2: Improper validation of FTP PASV reply address in mod_proxy_ftp in Apache Software Foundation Apache HTTP

Affects apache2Source GCVE Database

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Authoritative record:CVE-2026-63045· High 7.5

Not known to be exploited · CVSS 7.5 High · fixed in 2.4.7-1ubuntu4.22+esm17 : patch apache2 soon.

Data as of 10 Nov 2026, 06:09 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

Patch: Available – fixed in 2.4.7-1ubuntu4.22+esm17, 2.4.18-2ubuntu3.17+esm22, 2.4.29-1ubuntu4.27+esm13 +4

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 1 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Patches and advisories

ubuntu.com/security/notices/USN-8931-1 (opens in a new tab)

Affected software

Product	Affected	Fixed in
Ubuntu 26.10apache2`pkg:deb/ubuntu/apache2?arch=source&distro=stonking`Other threats	Affected =2.4.66-2ubuntu2 =2.4.68-1ubuntu4 =2.4.68-1ubuntu6.1	Fixed in–
Ubuntu 26.04 LTSapache2`pkg:deb/ubuntu/apache2?arch=source&distro=resolute`Other threats	Affected <2.4.66-2ubuntu2.6	Fixed in 2.4.66-2ubuntu2.6
Ubuntu 24.04 LTSapache2`pkg:deb/ubuntu/apache2?arch=source&distro=noble`Other threats	Affected <2.4.58-1ubuntu8.17	Fixed in 2.4.58-1ubuntu8.17
Ubuntu 22.04 LTSapache2`pkg:deb/ubuntu/apache2?arch=source&distro=jammy`Other threats	Affected <2.4.52-1ubuntu4.25	Fixed in 2.4.52-1ubuntu4.25
Ubuntu Pro 20.04 LTSapache2`pkg:deb/ubuntu/apache2?arch=source&distro=esm-infra/focal`Other threats	Affected <2.4.41-4ubuntu3.23+esm9	Fixed in 2.4.41-4ubuntu3.23+esm9
Ubuntu Pro 18.04 LTSapache2`pkg:deb/ubuntu/apache2?arch=source&distro=esm-infra/bionic`Other threats	Affected <2.4.29-1ubuntu4.27+esm13	Fixed in 2.4.29-1ubuntu4.27+esm13

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A patch is available and users should upgrade Apache HTTP Server to version 2.4.69 or the corresponding fixed Ubuntu package versions listed in the vendor advisory (e.g., 2.4.7-1ubuntu4.22+esm17 and later). Applying these official fixes fully remediates the vulnerability. No additional mitigation steps are required beyond applying the update.

Description

Apache HTTP Server versions prior to certain fixed releases contain a vulnerability in mod_proxy_ftp where improper validation of FTP PASV reply addresses allows a remote attacker to cause the proxy to open a data connection to an arbitrary third-party host. This affects forward proxy configurations. The issue is fixed in Apache HTTP Server version 2.4.69 and corresponding Ubuntu package updates.

Impact

A remote attacker controlling an untrusted FTP server can exploit this vulnerability in forward proxy configurations to cause the Apache HTTP Server proxy to open data connections to arbitrary third-party hosts. This can lead to unauthorized network connections and potential confidentiality breaches. The CVSS score of 7.5 indicates a high severity impact primarily on confidentiality. There is no indication of integrity or availability impact. No known exploits in the wild have been reported.

References

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