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How the mentioned CVE works:
CVE-2022-40896 is a vulnerability residing in Pygments, a popular syntax highlighter. The core issue lies in an Unrestricted File Upload vulnerability (CWE-434) within Pygments. Specifically, when processing maliciously crafted files, the library fails to properly sanitize input, allowing an attacker to execute arbitrary code or cause a denial of service. In the context of c2cciutils, the software does not directly introduce this flaw but rather pins a vulnerable version of Pygments (through its dependencies). The attack vector is Local (AV:L), meaning an attacker requires local access to the environment. The User Interaction required is Passive (UI:P), indicating the victim only needs to trigger the syntax highlighting functionality on malicious input. The primary impact is on Availability (VA:H), as exploiting this can crash the service or consume excessive resources. Because `c2cciutils` uses this pinned version, any Continuous Integration (CI) pipeline utilizing the tool is exposed if it processes untrusted code. The vulnerability is triggered when the tool encounters specially crafted files designed to exploit the Pygments flaw during its normal operation.
DailyCVE Form:
Platform: pip
Version: <=1.1.66
Vulnerability : Pinned vulnerable dependency
Severity: Moderate (6.8)
date: Mar 30, 2026
Prediction: Already Patched (1.1.67)
What Undercode Say:
This is a classic case of transitive dependency pinning leading to vulnerability propagation. The maintainers fixed it by unpinning or updating the requirement.
Check if your environment is vulnerable pip show c2cciutils | grep Version Verify the vulnerable dependency (Pygments) is present pip list | grep Pygments Commands to mitigate (if using the vulnerable version) Update c2cciutils to the patched version pip install --upgrade c2cciutils>=1.1.67 Alternatively, force upgrade Pygments if c2cciutils allows pip install --upgrade Pygments
Exploit:
Exploitation requires a malicious file crafted to trigger the Pygments CWE-434 vulnerability. An attacker would need to introduce this file into a CI pipeline where `c2cciutils` processes it (e.g., through a pull request). The exploit results in Denial of Service (Availability impact) or potentially arbitrary code execution depending on the Pygments context.
Protection from this CVE
Immediately update `c2cciutils` to version 1.1.67 or later. If using a requirements file, ensure the entry is updated to c2cciutils>=1.1.67. Conduct a scan of your CI artifacts to ensure no older versions are cached. Since the vulnerability is local and requires interaction, restrict CI pipeline execution to trusted code only until the update is applied.
Impact:
Availability. The primary impact is High on Availability. A successful exploit causes the CI process to crash or hang, disrupting the development workflow. Confidentiality and Integrity remain unaffected for the subsequent system. If the CI system is critical for deployment, this can lead to deployment delays and downtime.
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Sources:
Reported By: github.com
Extra Source Hub:
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