Security readout for executives and security teams
Plain-English summary
Gradio versions before 6.15.0 could let an attacker-controlled Hugging Face Space plant cookies into a shared proxy client. Those cookies may then be sent to other legitimate Spaces for later users, creating a cross-Space session fixation risk. The main business concern is unintended session influence across users and Spaces.
Executive priority
Treat as a high-priority dependency update for internet-facing or shared Gradio deployments. The issue can affect trust boundaries between users and Spaces, but current bundle evidence does not prove active exploitation.
Technical view
The issue is a CWE-384 session fixation flaw in Gradio's reverse proxy path. A module-level HTTP client shared across users could store a parent-domain cookie returned by one Space and replay it on later proxy requests to other Spaces. CVSS v4.0 is 7.6 high, with user interaction required and high confidentiality and integrity impact.
Likely exposure
Exposure is most likely where Gradio before 6.15.0 is deployed with the affected reverse proxy behavior, especially environments proxying Hugging Face Spaces or similar multi-user Space access. The bundle does not identify other affected products beyond gradio-app gradio.
Exploitation context
The provided data does not show CISA KEV listing or confirmed active exploitation. Exploitation requires a remote attacker controlling a Space and a user interaction condition, but the source description indicates the impact can extend to subsequent proxy requests by other users.
Researcher notes
Focus review on shared HTTP client state in the reverse proxy endpoint and cookie jar behavior across requests. Validate whether any local forks or wrappers preserve module-level clients after upgrading. Avoid assuming exploit prevalence; the bundle only supports vulnerability existence and a fixed release.
Mitigation direction
- Upgrade Gradio to version 6.15.0 or later.
- Review the Gradio 6.15.0 release notes and patch commit.
- Rebuild and redeploy applications pinned to vulnerable Gradio versions.
- If upgrade is delayed, check vendor guidance for supported interim mitigations.
- Assess whether exposed sessions or cookies need invalidation after remediation.
Validation and detection
- Inventory all deployments and dependency locks for Gradio versions below 6.15.0.
- Confirm runtime containers or environments load the fixed Gradio package.
- Identify public reverse proxy paths serving Spaces through Gradio.
- Review proxy logs for unusual cross-Space cookie setting behavior.
- Track the GitHub issue and pull request for vendor clarifications.
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-384: 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-2026-48545 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
- High
- CVSS
- 7.6 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/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
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:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N——VulnCheckCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N1.65.2VulnCheckVulnerability scoring details
Base CVSS 4.0 score
7.6HighVector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/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/gradio-app/gradio/releases/tag/gradio%406.15.0CVE reference, VulnCheck · release-notes
- https://github.com/gradio-app/gradio/issues/13369CVE reference, VulnCheck · issue-tracking
- https://github.com/gradio-app/gradio/pull/13384CVE reference, VulnCheck · issue-tracking
- https://github.com/gradio-app/gradio/commit/feb7237d01f359d2ad4ee42d00344e61692b3b39CVE reference, VulnCheck · patch
- https://www.vulncheck.com/advisories/gradio-cookie-injection-via-shared-proCVE 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.
Session Fixation
Session Fixation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.