CVE-2026-103471

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-30. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this weekElevated

Also known asEUVD-2026-90202 (ENISA EUVD) · GHSA-7gq6-qjjv-fgjh (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan mitigationNo fix is confirmed yet: check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule 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: 0.6%CVSS: 7.5Exploit: 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.

The CVE record's CNA (VulnCheck) lists Corvusoft restbed versions up to and including 5.0.0 as affected. No release containing a fix is confirmed on record.

restbed through 5.0.0 buffers HTTP request headers without enforcing a maximum size limit, allowing remote unauthenticated attackers to exhaust server memory. Attackers can open TCP connections and stream bytes indefinitely without sending the header delimiter, forcing the server to allocate unbounded heap memory until the process is killed.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.
EPSS PROB
0.6%
EPSS %ILE
46th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-30). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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; 60 days if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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

September 30, 2026

Last Modified

September 30, 2026

Advisory Details (5)

Auto-updated Sep 30, 2026
No fix on record yet.
Web page

restbed through 5.0.0 Denial of Service via Unbounded Header Buffering | Advisories | VulnCheck

https://www.vulncheck.com/advisories/restbed-through-5.0.0-denial-of-service-via-unbounded-header-buffering
Web page

restbed/src/corvusoft/restbed/session.cpp at e1227a297ce6d4e9f78222456507b29bb8ab77e9 · Corvusoft/restbed · GitHub

https://github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/corvusoft/restbed/session.cpp#L200
Web page

restbed/src/corvusoft/restbed/detail/service_impl.cpp at e1227a297ce6d4e9f78222456507b29bb8ab77e9 · Corvusoft/restbed · GitHub

https://github.com/Corvusoft/restbed/blob/e1227a297ce6d4e9f78222456507b29bb8ab77e9/src/corvusoft/restbed/detail/service_impl.cpp#L554
Web page

GitHub - Corvusoft/restbed: Corvusoft's Restbed framework brings asynchronous RESTful functionality to C++ applications. · GitHub

https://github.com/Corvusoft/restbed
Web page

[Security] Remote Unauthenticated Denial of Service (DoS) — Uncontrolled Resource Consumption · Issue #558 · Corvusoft/restbed · GitHub

https://github.com/Corvusoft/restbed/issues/558

Vendor Advisories for CVE-2026-103471(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 11× in last 7d / 71× 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.

  1. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  2. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  3. 2026-10-30 18:36 UTCEG score recompute
  4. 2026-10-30 18:36 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  5. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  6. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  7. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  8. 2026-10-27 20:36 UTCEG score recompute
  9. 2026-10-27 20:36 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  10. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  11. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  12. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  13. 2026-10-25 14:56 UTCEG score recompute
  14. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  15. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  16. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  17. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  18. 2026-10-20 19:15 UTCEG score recompute
  19. 2026-10-20 19:15 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  20. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  21. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  22. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  23. 2026-10-18 05:09 UTCEG score recompute
  24. 2026-10-17 19:43 UTCEG score recompute
  25. 2026-10-17 19:43 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
Show 63 more
  1. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  2. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  3. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  4. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  5. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  6. 2026-10-12 16:40 UTCEG score recompute
  7. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  8. 2026-10-11 20:34 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  9. 2026-10-11 20:15 UTCEG score recompute
  10. 2026-10-11 18:28 UTCEG score recompute
  11. 2026-10-11 15:01 UTCEG score recompute
  12. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  13. 2026-10-11 09:34 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  14. 2026-10-10 22:35 UTCEG score recompute
  15. 2026-10-10 22:35 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  16. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  17. 2026-10-10 11:30 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  18. 2026-10-10 00:32 UTCEG score recompute
  19. 2026-10-10 00:31 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  20. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  21. 2026-10-09 13:34 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  22. 2026-10-09 02:33 UTCEG score recompute
  23. 2026-10-09 02:33 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  24. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  25. 2026-10-08 15:35 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  26. 2026-10-08 04:27 UTCEG score recompute
  27. 2026-10-08 04:26 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  28. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  29. 2026-10-07 17:27 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  30. 2026-10-07 06:11 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  31. 2026-10-06 19:12 UTCEG score recompute
  32. 2026-10-06 19:12 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  33. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  34. 2026-10-06 08:14 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  35. 2026-10-05 21:17 UTCEG score recompute
  36. 2026-10-05 21:16 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  37. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  38. 2026-10-05 10:08 UTCEG score recompute
  39. 2026-10-05 10:08 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  40. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  41. 2026-10-04 23:10 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  42. 2026-10-04 12:11 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  43. 2026-10-04 01:13 UTCEG score recompute
  44. 2026-10-04 01:13 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  45. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  46. 2026-10-03 14:15 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  47. 2026-10-03 03:17 UTCEG score recompute
  48. 2026-10-03 03:17 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  49. 2026-10-02 16:18 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  50. 2026-10-02 05:20 UTCEG score recompute
  51. 2026-10-02 05:20 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  52. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  53. 2026-10-01 18:20 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  54. 2026-10-01 07:20 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  55. 2026-09-30 20:22 UTCEG score recompute
  56. 2026-09-30 20:22 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  57. 2026-09-30 19:26 UTCEG score recompute
  58. 2026-09-30 19:26 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  59. 2026-09-30 19:12 UTCEG score recompute
  60. 2026-09-30 19:12 UTCGHSA enrichmentGHSA-7gq6-qjjv-fgjh · GitHub severity HIGH · GitHub CVSS 7.5
  61. 2026-09-30 18:26 UTCEG score recompute
  62. 2026-09-30 17:36 UTCEG score recomputeFirst assessed: 7.5 HIGH
  63. 2026-09-30 17:35 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-103471?
CVE-2026-103471 is a high-severity vulnerability; its CVE record was published on September 30, 2026. restbed through 5.0.0 buffers HTTP request headers without enforcing a maximum size limit, allowing remote unauthenticated attackers to exhaust server memory. Attackers can open TCP connections and stream bytes indefinitely without sending the header delimiter, forcing the server to allocate…
When was CVE-2026-103471 made public?
CVE-2026-103471 was made public on September 30, 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 September 30, 2026. EchelonGraph's copy of the record carries a last-modified date of September 30, 2026; the record at its source may have been updated since.
Is CVE-2026-103471 actively exploited?
CVE-2026-103471 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (46th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-103471?
CVE-2026-103471 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-103471?
No fix for CVE-2026-103471 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 CVE record's CNA (VulnCheck) lists Corvusoft restbed versions up to and including 5.0.0 as affected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-103471 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-103471

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