CVE-2026-48611
Exploitation reported by one source. First attested on 2026-07-20 by GCVE · kevintel.
- Published2026-06-12
- WeaknessCWE-287
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Improper authentication checks in the OAuth implementation allow account hijacking even when OAuth is not configured or enabled leading to unauthorized access in default installations.
Timeline
dates in UTC- 2026-06-1204:17CVE publishedNVD
- 2026-07-2007:57Listed as exploited by GCVEGCVE
- 2026-07-2007:57Exploitation first reportedGCVE
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-48611?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-48611?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-48611 yet.
Fix
No fix published by the sources we read yet. NVD record
Detection
read 2026-10-23 19:25 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- 2 repositories, unverifiedlxdwnpiper/CVE-2026-48611-phpBBEthicalgrey/phpBB-CVE-2026-48611 PoC-in-GitHub
Sources
- NVDCVE recordread 2026-10-23
- GCVEexploitation2026-07-20
- CISA-ADPSSVC decisionnone2026-06-12
- OpenCVESSVC decisionnone—
- CNACVSS 3.09.8read 2026-10-23
- CNAweakness (CWE)CWE-287read 2026-10-23
- FIRST EPSSEPSS score2.9 %2026-10-22
- PoC-in-GitHubproof of concept2read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2026-06-12
- Last Modified
- 2026-06-17
- NVD status
- Deferred
Frequently asked questions
What is CVE-2026-48611?
Is CVE-2026-48611 actively exploited?
What is the CVSS score for CVE-2026-48611?
Hear about the next vulnerability in your software
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
No credit card required · No monthly cap on website lookups · 250 API requests/month
Go further
- For a threat intelligence platform: malware, C2 and ransomware indicators over STIX/TAXII.
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
- Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.
Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.