CVE-2026-86111

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.43% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 37.5% of scored records. A rank, not a probability.

NVD base score

7.1 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-09-08.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-05 09:59Z1 MO AGO

Last updated

2026-09-24 14:20Z1 MO AGO

Reserved

2026-09-05

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 7.1)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Weaknesses

• CWE-639Authorization Bypass Through User-Controlled KeyBase

Data version

5.2

Document digest

915a93c019b9691e337068b4e0ee1e3d870c197c1058531e437feaf4b5c4e0d7

• github.comResearcher write-up: finding 1https://github.com/geo-chen/oss/blob/main/bookwyrm.md#finding-1-authenticated-idor-in-editstatus-exposes-private-review-comment-and-quotation-contenttechnical-description
• github.comEditStatus.get: no visibility checkhttps://github.com/bookwyrm-social/bookwyrm/blob/v0.9.1/bookwyrm/views/status.pytechnical-description
• github.comcompose template renders draft.raw_contenthttps://github.com/bookwyrm-social/bookwyrm/blob/v0.9.1/bookwyrm/templates/snippets/create_status/content_field.htmltechnical-description
• github.comhttps://github.com/bookwyrm-social/bookwyrmproduct
• www.vulncheck.comVulnCheck Advisory: BookWyrm through 0.9.1 Insecure Direct Object Reference in EditStatus Exposes Followers-Only and Direct Statuseshttps://www.vulncheck.com/advisories/bookwyrm-through-0.9.1-insecure-direct-object-reference-in-editstatus-exposes-followers-only-and-direct-statusesthird-party-advisory