Security readout for executives and security teams
Plain-English summary
CVE-2026-43644 is a reflected XSS issue in podinfo through 6.11.2. If a victim is tricked into visiting an attacker-controlled page, script can run under the podinfo site’s origin. Business risk is limited but real where podinfo is reachable by users or the internet.
Executive priority
Treat as a moderate-priority web exposure issue. It is not listed as known exploited, but public or shared podinfo instances should be reviewed promptly because exploitation requires only user interaction and could affect confidentiality and integrity in that origin.
Technical view
The /echo and /api/echo handlers reflect request body content without explicit Content-Type or X-Content-Type-Options headers. The advisory says Go content detection can serve attacker-controlled body content as text/html, enabling reflected script execution in the podinfo origin context. CVSS is 5.4, network reachable, low complexity, no privileges, user interaction required.
Likely exposure
Exposure applies to deployments of stefanprodan podinfo through 6.11.2 where /echo or /api/echo are reachable. Risk is highest for internet-facing or shared internal instances. Evidence does not show impact beyond podinfo deployments.
Exploitation context
The source bundle describes a user-interaction reflected XSS scenario. KEV status is false, and the provided sources do not state active exploitation in the wild. One reference is tagged as exploit, but this assessment does not rely on or repeat weaponization details.
Researcher notes
The root issue is unsafe reflection plus content sniffing behavior, not a stored payload or authentication bypass. Available evidence names podinfo through 6.11.2 and the /echo endpoints. Patch status is not established in the provided bundle, so avoid asserting a fixed version without vendor confirmation.
Mitigation direction
- Check vendor issue and advisory sources for an official fixed version or guidance.
- Upgrade podinfo when a vendor-supported fixed release is available.
- Restrict access to podinfo instances that do not need public reachability.
- Block or disable /echo and /api/echo if they are unnecessary in your deployment.
- Apply safe response headers where vendor guidance supports that configuration.
Validation and detection
- Inventory podinfo deployments and confirm whether versions are through 6.11.2.
- Verify whether /echo and /api/echo are reachable from user or internet networks.
- Review responses for explicit Content-Type and X-Content-Type-Options headers after remediation.
- Confirm compensating controls restrict access to affected endpoints.
- Track the GitHub issue and advisory pages for patch status updates.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2026-43644 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
- 5.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A: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
2 official scoresWe 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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N2.82.5VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
5.1MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A: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://github.com/Niccolo10/Security-Advisories/blob/main/CVE-2026-43644/cve-2026-43644.mdCVE reference, VulnCheck · technical-description, exploit
- https://github.com/stefanprodan/podinfo/issues/474CVE reference, VulnCheck · issue-tracking
- https://www.vulncheck.com/advisories/podinfo-reflected-xss-via-echo-endpointCVE 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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.