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Fencer Vulns
high 7.1

CVE-2026-110865 json

Renovate before 44.60.1 HTTP Header Allowlist Bypass via Shared Presets

published 2026-10-14 25 d ago modified 2026-10-26 13 d ago also EUVD-2026-101748

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 8%
public exploits
0
none known

Summary

Renovate before 44.60.1 contains an allowlist bypass vulnerability that allows repository users to evade the allowedHeaders restriction by placing hostRules headers inside shared presets. Attackers can supply internal or externally sourced presets with unvalidated hostRules[].headers to inject custom HTTP headers into requests Renovate sends to other hosts.

Patch / fix

  • renovatebot renovate 44.60.1
  • mend renovate-ce 15.5.0
  • mend renovate-ee-server 15.5.0
  • mend renovate-ee-worker 15.5.0
  • mend mend-renovate-ce helm chart 15.5.0
  • mend mend-renovate-enterprise-edition helm chart 10.5.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-110865 updated cvss 7.1

renovate: Renovate: HTTP header injection via shared configuration presets

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
13 d ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/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

Affected products

  • renovatebot renovate
  • mend renovate-ce
  • mend renovate-ee-server
  • mend renovate-ee-worker
  • mend mend-renovate-ce helm chart
  • mend mend-renovate-enterprise-edition helm chart

Classification

Weakness
  • CWE-424 Improper Protection of Alternate Path

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.