7.7

CVE-2026-106455: backstage Server-Side Request Forgery (SSRF)

CVSS: 7.7v3.1HighAnalyzed
AliasesGHSA-q38j-6vcm-2f5m
Published 06-10-2026Last modified 09-10-2026
Open JSON

Vulnerability summary

CVE-2026-106455 is a high (CVSS 7.7) Server-Side Request Forgery (SSRF) vulnerability in backstage. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 24.9% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.7/10
010
High · v3.1 (CVE.org)
EPSS score
0.33%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 06-10-2026
    PublishedVulnerability first disclosed.
  2. 09-10-2026
    Last modifiedVulnerability information updated.

Description

Backstage is an open framework for building developer portals. From 0.11.12 until 1.14.7 and 1.15.5, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs plugin configuration in techdocs. An authenticated attacker with control over a TechDocs source repository could cause a documentation build to retrieve and publish data from network locations reachable by the build environment. Exposure depends on deployment topology, build mode, and target endpoint protections. Modern cloud metadata services that require tokens or special headers are not directly accessible through the affected behavior. This issue is fixed in @backstage/plugin-techdocs-node versions 1.14.7 and 1.15.5.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.33%

Chance of exploitation in the next 30 days

Percentile

25%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

07-10-202619-10-2026
EPSS score
0.33%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

@backstage2 products
  • plugin-techdocs-node≥ 0.11.12, < 1.14.7 | ≥ 1.15.0, < 1.15.5
  • plugin-techdocs-node≥ 0.11.12, < 1.14.7 | ≥ 1.15.0, < 1.15.5
Linuxfoundation2 products
  • backstage≥ 0.71.1, < 1.50.6 | ≥ 1.51.1, < 1.54.8 | 1.51.0 | 1.51.0:next0 | 1.51.0:next1 | 1.51.0:next2 | 1.51.0:next3
  • backstage_plugin-techdocs-node≥ 0.11.12, < 1.14.7 | ≥ 1.15.0, < 1.15.5
Backstage1 product
  • backstage≥ 0.71.1, < 1.50.6 | ≥ 1.51.0-next.0, < 1.54.8

3 vendors · 5 products

References

8 links