CVE-2026-77087

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreHIGH confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-21. a secondary CVSS source baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
Trending — 3 sources updated this week
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 9.6Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Paperclip before 0.3.1 in default local_trusted mode fails to validate Host headers, allowing attackers to execute arbitrary commands via DNS rebinding. An attacker can craft a malicious webpage that, when visited by a developer running Paperclip locally, uses DNS rebinding to make authenticated API requests and execute commands through the process adapter.

CVSS v3
9.6
EG Score
9.6(high)
EG Risk
48(Track)
EG Risk 48/100SSVC: Track

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
Severity96% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
—
EPSS %ILE
—
KEV
Not listed

Published

August 21, 2026

Last Modified

August 21, 2026

Advisory Details (2)

Auto-updated Aug 21, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Paperclip before 0.3.1 Remote Code Execution via DNS Rebinding | Advisories | VulnCheck

https://www.vulncheck.com/advisories/paperclip-before-remote-code-execution-via-dns-rebinding
github Patch Available🟡 PoC Available

Drive-by RCE Against Local Paperclip Instances via DNS Rebinding · Advisory · paperclipai/paperclip · GitHub

https://github.com/paperclipai/paperclip/security/advisories/GHSA-x8hx-rhr2-9rf7

Vendor Advisories for CVE-2026-77087(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 7× in last 7d / 7× 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. 2026-08-21 23:45 UTCGHSA enrichment
  2. 2026-08-21 20:03 UTCGHSA enrichment
  3. 2026-08-21 16:21 UTCEG score recompute
  4. 2026-08-21 16:21 UTCGHSA enrichment
  5. 2026-08-21 15:21 UTCEG score recompute
  6. 2026-08-21 15:10 UTCEG score recompute
  7. 2026-08-21 15:09 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2026-77087?
CVE-2026-77087 is a critical vulnerability published on August 21, 2026. Paperclip before 0.3.1 in default local_trusted mode fails to validate Host headers, allowing attackers to execute arbitrary commands via DNS rebinding. An attacker can craft a malicious webpage that, when visited by a developer running Paperclip locally, uses DNS rebinding to make authenticated…
When was CVE-2026-77087 disclosed?
CVE-2026-77087 was first published in the National Vulnerability Database on August 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-77087?
CVE-2026-77087 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-77087?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77087, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-77087

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