Security readout for executives and security teams
Plain-English summary
CVE-2026-22190 affects Panda3D’s egg-mkfont utility through its glyph pattern option. A malicious or unsafe command-line value can cause the tool to copy unintended stack memory values into generated font output files. This is primarily a confidentiality issue for development or build environments, not a remote server takeover scenario based on the provided sources.
Executive priority
Treat this as a targeted build-chain confidentiality risk. Prioritize teams that publish assets from automated builds or accept external game/font assets. It is not currently evidenced as mass-exploited, but it can leak sensitive memory values into artifacts if unsafe inputs reach egg-mkfont.
Technical view
The vulnerability is CWE-134: uncontrolled format string. In Panda3D up to and including 1.10.16, egg-mkfont passes the -gp value directly to sprintf() as a format string with only one argument. Extra format specifiers may read stack-resident values and emit them into generated .egg and .png files. CVSS v4.0 is 5.1, local attack vector.
Likely exposure
Exposure is most likely where Panda3D egg-mkfont is installed and used in automated asset, font, game, or build pipelines. Risk increases if -gp values can be influenced by untrusted project files, users, CI inputs, or third-party asset workflows.
Exploitation context
The provided sources describe technical exploitability and include a public technical reference, but the CVE is not listed as KEV and no cited source states active exploitation. Exploitation requires local tool execution with a crafted glyph pattern value and results in information disclosure through generated output files.
Researcher notes
The affected-version data in the provided bundle is inconsistent: the narrative says Panda3D <=1.10.16, while the structured affected entry lists version 0 with defaultStatus unaffected. Use vendor and CVE updates to confirm exact affected releases. Do not assume remote exploitability from the available evidence.
Mitigation direction
- Check Panda3D guidance for a fixed release or official patch.
- Avoid processing untrusted glyph pattern values with egg-mkfont.
- Restrict who can modify asset-build inputs and CI font-generation parameters.
- Review generated .egg and .png artifacts before publishing from untrusted builds.
- Isolate asset conversion jobs from secrets and sensitive environment data.
Validation and detection
- Inventory Panda3D installations and egg-mkfont usage across developer and CI systems.
- Identify versions up to and including Panda3D 1.10.16.
- Review build scripts for dynamic or user-controlled -gp values.
- Check whether generated font artifacts leave controlled build environments.
- Monitor CVE, Panda3D, and VulnCheck pages for remediation updates.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-134: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-22190 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.1 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
5.1MediumVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://seclists.org/fulldisclosure/2026/Jan/11CVE reference, VulnCheck · technical-description, exploit
- https://www.panda3d.org/CVE reference, VulnCheck · product
- https://github.com/panda3d/panda3dCVE reference, VulnCheck · product
- https://www.vulncheck.com/advisories/panda3d-egg-mkfont-format-string-information-disclosureCVE reference, VulnCheck · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use of Externally-Controlled Format String
Use of Externally-Controlled Format String represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.