CVE-2026-77087

CRITICALPre-NVD 9.69.6
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-21. The CNA's CVSS baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 3 sources updated this weekElevated
9.6EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.6Exploit: No code on recordExposed services: Not assessed

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

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
9.6CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

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 (value × EchelonGraph’s weight)
Severity96% × 45%
The EG Score, 9.6 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 21, 2026

Last Modified

October 1, 2026

Advisory Details (2)

Auto-updated Oct 2, 2026
No fix on record yet. Sources: github.
Web page

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 advisoryMentions a patch (unverified)

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 29× in last 7d / 192× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 365 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 265 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 19:23 UTCEG score recompute
  2. 2026-10-11 16:39 UTCEG score recompute
  3. 2026-10-11 13:58 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  7. 2026-10-09 05:56 UTCEG score recompute
  8. 2026-10-09 05:56 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  9. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  10. 2026-10-08 08:41 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  11. 2026-10-08 04:56 UTCEG score recompute
  12. 2026-10-08 04:56 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  14. 2026-10-07 08:55 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  15. 2026-10-07 05:12 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  16. 2026-10-07 01:14 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  17. 2026-10-06 21:18 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  18. 2026-10-06 16:50 UTCEG score recompute
  19. 2026-10-06 16:50 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  21. 2026-10-06 12:12 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  22. 2026-10-06 07:49 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  23. 2026-10-06 03:05 UTCEG score recompute
  24. 2026-10-06 03:05 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  25. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 39th percentile
Show 75 more
  1. 2026-10-05 17:33 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  2. 2026-10-05 13:50 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  3. 2026-10-05 09:26 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  4. 2026-10-05 05:14 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  5. 2026-10-05 01:31 UTCEG score recompute
  6. 2026-10-05 01:31 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  7. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  8. 2026-10-04 20:48 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  9. 2026-10-04 13:44 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  10. 2026-10-04 10:02 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  11. 2026-10-04 06:13 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  12. 2026-10-04 02:30 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  13. 2026-10-03 20:24 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  14. 2026-10-03 16:42 UTCEG score recompute
  15. 2026-10-03 16:42 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  16. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  17. 2026-10-03 05:38 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  18. 2026-10-03 01:56 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  19. 2026-10-02 22:14 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  20. 2026-10-02 18:32 UTCEG score recompute
  21. 2026-10-02 18:32 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  22. 2026-10-02 14:49 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  23. 2026-10-02 10:28 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  24. 2026-10-02 06:46 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  25. 2026-10-02 01:19 UTCEG score recompute
  26. 2026-10-02 01:19 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  27. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  28. 2026-10-01 19:31 UTCEG score recompute
  29. 2026-10-01 19:31 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  30. 2026-10-01 13:07 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  31. 2026-10-01 09:24 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  32. 2026-10-01 05:40 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  33. 2026-10-01 01:10 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  34. 2026-09-30 20:28 UTCEG score recompute
  35. 2026-09-30 20:28 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  36. 2026-09-30 11:54 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  37. 2026-09-30 07:54 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  38. 2026-09-29 16:13 UTCEG score recompute
  39. 2026-09-29 16:13 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  40. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  41. 2026-09-29 05:31 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  42. 2026-09-29 01:48 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  43. 2026-09-28 21:35 UTCEG score recompute
  44. 2026-09-28 21:35 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  45. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  46. 2026-09-28 13:14 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  47. 2026-09-28 09:32 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  48. 2026-09-28 05:50 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  49. 2026-09-28 02:08 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  50. 2026-09-27 22:22 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  51. 2026-09-27 18:24 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  52. 2026-09-27 14:42 UTCEG score recompute
  53. 2026-09-27 14:42 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  54. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  55. 2026-09-27 09:54 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  56. 2026-09-27 06:12 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  57. 2026-09-27 02:30 UTCEG score recompute
  58. 2026-09-27 02:30 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  59. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  60. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  61. 2026-09-25 17:07 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  62. 2026-09-25 11:48 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  63. 2026-09-25 07:58 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  64. 2026-09-25 04:16 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  65. 2026-09-25 00:34 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  66. 2026-09-24 20:15 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  67. 2026-09-24 16:55 UTCEG score recompute
  68. 2026-09-24 16:55 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  69. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  70. 2026-09-24 12:48 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  71. 2026-09-24 09:04 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  72. 2026-09-24 05:22 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  73. 2026-09-24 01:40 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  74. 2026-09-23 21:57 UTCGHSA enrichmentGHSA-gwmj-hf32-5v8v · GitHub severity CRITICAL · GitHub CVSS 9.6
  75. 2026-09-23 18:15 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77087?
CVE-2026-77087 is a critical-severity vulnerability; its CVE record was 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 made public?
CVE-2026-77087 was made public on July 22, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 21, 2026. EchelonGraph's copy of the record carries a last-modified date of October 1, 2026; the record at its source may have been updated since.
Is CVE-2026-77087 actively exploited?
CVE-2026-77087 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77087?
CVE-2026-77087 has a CVSS base score of 9.6 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-77087?
No fix for CVE-2026-77087 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-77087 are linked in the Vendor Advisories panel on this page.

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