November 14, 2026

CVE Watchtower

CVE-2026-45793Exposure of Sensitive Information to an Unauthorized Actor

NVDCVSS scored by security-advisories@github.com

Vulnerability Summary

Composer is a dependency Manager for the PHP language. Prior to 1.10.28, 2.2.28, and 2.9.8, Composer\IO\BaseIO::loadConfiguration() validates GitHub OAuth tokens with the regex ^[.A-Za-z0-9_]+$ and interpolates rejected tokens into an UnexpectedValueException; GitHub Actions GITHUB_TOKEN values using the ghs_<id>_<base64url-JWT> format can contain -, fail validation, and be disclosed to stderr or CI logs. This issue is fixed in versions 1.10.28, 2.2.28, and 2.9.8.
Severity Level
HIGH(7.5)
Published Date
Jul 15, 2026
Last Modified
Jul 15, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.80%Probability
Root Weakness (CWE)
CWE-200: Exposure of Sensitive Information to an Unauthorized Actor β†—
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
CVSS v3.1 Base Metrics — Score 7.5 (HIGH)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone

Affected & Patched Versions

Affected Versions
Not provided by NVD for this CVE.
Patched Versions
No patched version published yet
Until a fix ships, reduce exposure:
  • Restrict access to the affected service or interface to trusted networks.
  • Disable the affected feature if you do not need it.
  • Watch the vendor advisory for a firmware or software update.

What to do

Plan remediation soon. No exploitation is confirmed yet, but the severity is high.

  1. Check whether you run the affected product and which version.
  2. No patched version is listed yet. Limit access to the affected service to trusted networks, and disable the feature if you can.
  3. Subscribe to the vendor advisory so you learn when a fix ships.

Timeline

  • Jul 15, 2026Published
  • Jul 15, 2026Record last modified

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

Get alerts for CVEs like this oneYou are reading CVE-2026-45793. Get an email when KEV listings, exploits or new CVEs match your stack.
Set up CVE alerts

Related Coverage

External References

Data last checked: Nov 14, 2026 13:06 UTC