Skip to main content
VulnerabilityPublished Updated

CVE-2026-45243: steipete summarize · Missing Authorization

Affects steipete summarizeSource CVE Database V5

0
Compare

Not known to be exploited · CVSS 5.3 Medium : upgrade to 0.15.1 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.15.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade steipete/summarize and summarize to 0.15.1.

Affected software

ProductAffectedFixed in
steipetesummarizeAffected
  • <0.15.1
Fixed in–
GitHubsteipete/summarizepkg:github/steipete/summarizeOther threatsAffected
  • <0.15.1
Fixed in
  • 0.15.1
GitHubsummarizepkg:github/summarizeOther threatsAffected
  • <0.15.1
Fixed in
  • 0.15.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, users should exercise caution when visiting untrusted web pages and consider restricting or monitoring the use of the summarize extension in sensitive environments.

Description

Summarize prior to 0.15.1 contains a missing authorization vulnerability in the content script window.postMessage bridge that allows malicious pages to perform unauthorized operations on automation artifacts. Attackers can simulate runtime messages with spoofed sender identifiers to list, read, create, overwrite, or delete automation artifacts scoped to the affected tab without proper authorization checks.

References

Community reviews

Loading reviews…