CVE-2026-71486

MEDIUMPre-NVD 4.34.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 4.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (29th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
4.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

vLLM is an inference and serving engine for large language models. Prior to 0.26.0, the /v1/completions/derender and /v1/chat/completions/derender endpoints accept caller-supplied GenerateResponse objects whose generate_responses, choices, token_ids, prompt_logprobs, logprobs.content, top_logprobs, and routed_experts structures are processed by OnlineDerenderer and tokenizer.decode before max_model_len, max_tokens, max_num_seqs, or response-size limits are enforced, allowing an authenticated API client to consume excessive CPU and memory and produce oversized responses. This issue is fixed in version 0.26.0.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
19
EG Risk 19/100

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)
Severity43% × 45%
The EG Score, 4.3 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
29th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (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)60 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 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

August 17, 2026

Last Modified

October 2, 2026

Advisory Details (4)

Auto-updated Aug 17, 2026
Patch available. Sources: github_release, github, github_commit, github_pr.
GitHub advisoryMentions a patch (unverified)

Derender endpoints decode caller-supplied GenerateResponse token IDs without output bounds · Advisory · vllm-project/vllm · GitHub

https://github.com/vllm-project/vllm/security/advisories/GHSA-8737-qx52-hjff
GitHub release Patch Available

v0.26.0

Patch available: vllm-project/vllm v0.26.0

https://github.com/vllm-project/vllm/releases/tag/v0.26.0
GitHub pull request

fix(security): add resource bounds validation to derender endpoints

Fix merged in vllm-project/vllm PR #47260 on 2026-07-07 — awaiting tagged release

https://github.com/vllm-project/vllm/pull/47260
GitHub commit

commit 8e61b646e2d1 (vllm-project/vllm)

Fix landed in vllm-project/vllm commit 8e61b646e2d1 — awaiting tagged release

https://github.com/vllm-project/vllm/commit/8e61b646e2d157f9b93451fa048f9c8530c8a67b

Vendor Advisories for CVE-2026-71486(6)

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

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
vllm0.0.1 ... 0.9.2 (92 versions)
  • every version up to 0.26.0: fixed in 0.26.0
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 45× 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.

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. 1 repeat row among the latest 93 is merged into the row it repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  3. 2026-10-12 15:42 UTCEG score recompute
  4. 2026-10-11 19:28 UTCEG score recompute
  5. 2026-10-11 16:43 UTCEG score recompute
  6. 2026-10-11 14:03 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  10. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  12. 2026-10-07 11:26 UTCEG score recompute
  13. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  14. 2026-10-06 09:02 UTCEG score recompute
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  17. 2026-10-03 20:26 UTCEG score recompute
  18. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  19. 2026-10-02 19:32 UTCEG score recompute
  20. 2026-10-02 15:45 UTCEG score recompute
  21. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  22. 2026-10-01 10:53 UTCEG score recompute
  23. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  24. 2026-09-30 09:58 UTCEG score recompute
  25. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 37th percentile
Show 67 more
  1. 2026-09-28 09:00 UTCEG score recompute
  2. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  3. 2026-09-27 08:05 UTCEG score recompute
  4. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  5. 2026-09-24 13:22 UTCEG score recompute
  6. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  7. 2026-09-23 12:27 UTCEG score recompute
  8. 2026-09-22 11:33 UTCEG score recompute
  9. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  10. 2026-09-21 10:38 UTCEG score recompute
  11. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  12. 2026-09-20 09:44 UTCEG score recompute
  13. 2026-09-19 06:14 UTCEG score recompute
  14. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  15. 2026-09-18 05:19 UTCEG score recompute
  16. 2026-09-17 04:25 UTCEG score recompute
  17. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  18. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  19. 2026-09-16 03:29 UTCEG score recompute
  20. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  21. 2026-09-14 01:35 UTCEG score recompute
  22. 2026-09-13 00:40 UTCEG score recompute
  23. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  24. 2026-09-11 23:45 UTCEG score recompute
  25. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  26. 2026-09-10 22:22 UTCEG score recompute
  27. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  28. 2026-09-09 03:38 UTCEG score recompute
  29. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  30. 2026-09-07 16:11 UTCEG score recompute
  31. 2026-09-06 15:15 UTCEG score recompute
  32. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  33. 2026-09-05 14:13 UTCEG score recompute
  34. 2026-09-04 13:10 UTCEG score recompute
  35. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  36. 2026-09-03 12:14 UTCEG score recompute
  37. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  38. 2026-09-02 10:38 UTCEG score recompute
  39. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  40. 2026-09-01 09:44 UTCEG score recompute
  41. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  42. 2026-08-31 07:25 UTCEG score recompute
  43. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  44. 2026-08-30 06:20 UTCEG score recompute
  45. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  46. 2026-08-29 05:24 UTCEG score recompute
  47. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  48. 2026-08-27 21:43 UTCEG score recompute
  49. 2026-08-26 20:49 UTCEG score recompute
  50. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  51. 2026-08-25 19:53 UTCEG score recompute
  52. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  53. 2026-08-24 18:58 UTCEG score recompute
  54. 2026-08-23 18:04 UTCEG score recompute
  55. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  56. 2026-08-22 17:09 UTCEG score recompute
  57. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  58. 2026-08-21 16:11 UTCEG score recompute
  59. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  60. 2026-08-20 15:13 UTCEG score recompute
  61. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  62. 2026-08-19 14:19 UTCEG score recompute
  63. 2026-08-18 13:49 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  64. 2026-08-18 13:23 UTCEG score recompute
  65. 2026-08-18 12:42 UTCEG score recompute
  66. 2026-08-17 20:20 UTCEG score recomputeFirst assessed: 4.3 MEDIUM
  67. 2026-08-17 20:19 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-71486?
CVE-2026-71486 is a medium-severity vulnerability; its CVE record was published on August 17, 2026. vLLM is an inference and serving engine for large language models. Prior to 0.26.0, the /v1/completions/derender and /v1/chat/completions/derender endpoints accept caller-supplied GenerateResponse objects whose generateresponses, choices, tokenids, promptlogprobs, logprobs.content, toplogprobs, and…
When was the CVE record for CVE-2026-71486 published?
The CVE record for CVE-2026-71486 was published on August 17, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 2, 2026; the record at its source may have been updated since.
Is CVE-2026-71486 actively exploited?
CVE-2026-71486 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-71486?
CVE-2026-71486 has a CVSS base score of 4.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-71486?
A fix for CVE-2026-71486 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-71486 are linked in the Vendor Advisories panel on this page.

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