CVE-2026-102877

MEDIUMPre-NVD 4.44.4—
EchelonGraph scoreHIGH confidence

Score 4.4 from GitHub Security Advisory (severity: LOW) published 2026-09-29. A secondary CVSS source baseline 4.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
4.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.4Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Fider before 0.38.0 contains a server-side request forgery vulnerability due to a time-of-check time-of-use gap in URL validation for webhooks and custom OAuth provider endpoints. Administrators controlling DNS can perform DNS rebinding attacks to make the Fider server send requests to internal services or cloud metadata endpoints.

CVSS v3
4.4
EG Score
4.4MEDIUMhigh confidence
EG Risk
36
EG Risk 36/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity44% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
10th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 29, 2026

Last Modified

September 30, 2026

Advisory Details (7)

Auto-updated Sep 29, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github, github_commit.
generic

Fider before 0.38.0 SSRF via DNS rebinding in webhook validation | Advisories | VulnCheck

https://www.vulncheck.com/advisories/fider-before-0.38.0-ssrf-via-dns-rebinding-in-webhook-validation
generic

GitHub - getfider/fider: Open platform to collect and prioritize feedback · GitHub

https://github.com/getfider/fider
github_release Patch Available

v0.38.0

Patch available: getfider/fider v0.38.0

https://github.com/getfider/fider/releases/tag/v0.38.0
generic

fider/app/services/httpclient/httpclient.go at v0.37.0 · getfider/fider · GitHub

https://github.com/getfider/fider/blob/v0.37.0/app/services/httpclient/httpclient.go
generic

fider/app/pkg/validate/general.go at v0.37.0 · getfider/fider · GitHub

https://github.com/getfider/fider/blob/v0.37.0/app/pkg/validate/general.go
github_commit Patch Available

commit 45f5627b9fd1 (getfider/fider)

Patch available: getfider/fider v0.38.0 (contains commit 45f5627b9fd1)

https://github.com/getfider/fider/commit/45f5627b9fd15b912fb9092635c863fb4c91dd69
github Patch Available🟡 PoC Available

SSRF via DNS Rebinding in Webhook and Custom OAuth Provider URL Validation · Advisory · getfider/fider · GitHub

https://github.com/getfider/fider/security/advisories/GHSA-whx4-hxwq-qgjh

Vendor Advisories for CVE-2026-102877(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 18× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-03 21:55 UTCEG score recompute
  2. 2026-10-03 21:55 UTCGHSA enrichment
  3. 2026-10-03 14:25 UTCEPSS rescore
  4. 2026-10-02 21:27 UTCEG score recompute
  5. 2026-10-02 21:27 UTCGHSA enrichment
  6. 2026-10-01 20:53 UTCEG score recompute
  7. 2026-10-01 20:52 UTCGHSA enrichment
  8. 2026-10-01 19:49 UTCEPSS rescore
  9. 2026-09-30 20:23 UTCEG score recompute
  10. 2026-09-30 20:23 UTCGHSA enrichment
  11. 2026-09-30 19:36 UTCEG score recompute
  12. 2026-09-30 19:36 UTCGHSA enrichment
  13. 2026-09-30 17:45 UTCEG score recompute
  14. 2026-09-30 17:45 UTCGHSA enrichment
  15. 2026-09-30 15:02 UTCEPSS rescore
  16. 2026-09-29 20:22 UTCEG score recompute
  17. 2026-09-29 20:03 UTCEG score recompute
  18. 2026-09-29 20:03 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-102877?
CVE-2026-102877 is a medium vulnerability published on September 29, 2026. Fider before 0.38.0 contains a server-side request forgery vulnerability due to a time-of-check time-of-use gap in URL validation for webhooks and custom OAuth provider endpoints. Administrators controlling DNS can perform DNS rebinding attacks to make the Fider server send requests to internal…
When was CVE-2026-102877 disclosed?
CVE-2026-102877 was first published on September 29, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-102877 actively exploited?
CVE-2026-102877 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (10th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-102877?
CVE-2026-102877 has a CVSS base score of 4.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-102877?
A fix for CVE-2026-102877 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-102877 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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