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CVE-2018-11756

34
FAUCET Score

CVE-2018-11756 is a critical vulnerability affecting Apache OpenWhisk PHP Runtime versions 7.1:1.0.1 and 7.2:1.0.0 (or earlier), allowing an attacker to replace user functions within Docker containers if the user's code is exploitable. With a CVSS score of 9.8 (Critical), it presents a severe risk due to its network-based attack vector, low attack complexity, and complete compromise of confidentiality, integrity, and availability. While no public exploit code (Metasploit, Nuclei, ExploitDB) is currently available, the vulnerability has garnered some community discussion and media coverage, including a SecurityWeek article highlighting its potential for code overwrites in IBM Cloud.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.1CPE matchmatch criteria
cpe:2.3:a:apache:openwhisk:*:*:*:*:*:*:*:*
< 1.0.2CPE matchmatch criteria
cpe:2.3:a:apache:openwhisk:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
8.20%
Probability of exploitation in next 30 days
EPSS Percentile
94.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0820 is in the 90th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

puresec.io / hubfs/Apache%20OpenWhisk%20PureSec%20Security%20Advisory.pdf
MitigationTechnical DescriptionThird Party Advisory
github.com / apache/incubator-openwhisk-runtime-php/commit/6caf902f527250ee4b7b695929b628d560e0dad1
PatchThird Party Advisory
lists.apache.org / thread.html/439bd5ff5822708c645a0d816ed9914b88c97eda32eae6ea211bc0dc%40%3Cdev.openwhisk.apache.org%3E
securityfocus.com / bid/104915
Third Party AdvisoryVDB Entry