CVE-2026-49476

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (49th 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
Elevated
7.5EG
EchelonGraph verdictPlan a fixRemediate 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: 0.6%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.8.4, the CSS selector parser in soupsieve allocates unbounded memory when compiling large comma-separated selector lists, allowing an attacker who can supply a crafted selector string to soupsieve.compile() or Beautiful Soup .select() / .select_one() to allocate hundreds of megabytes of heap memory from a relatively small input and cause denial of service. This issue is fixed in version 2.8.4.

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 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)
Severity75% × 45%
The EG Score, 7.5 of 10.
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: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.6%
EPSS %ILE
49th
KEV
Not listed

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

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

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

July 9, 2026

Last Modified

July 28, 2026

Advisory Details (3)

Auto-updated Jul 15, 2026
Patch available. Sources: github_release, github, github_commit.
GitHub advisoryMentions a patch (unverified)

Memory Exhaustion via Large Comma-Separated Selector Lists in soupsieve · Advisory · facelessuser/soupsieve · GitHub

https://github.com/facelessuser/soupsieve/security/advisories/GHSA-2wc2-fm75-p42x
GitHub release Patch Available

2.8.4

Patch available: facelessuser/soupsieve 2.8.4

https://github.com/facelessuser/soupsieve/releases/tag/2.8.4
GitHub commit Patch Available

commit 28108ab80581 (facelessuser/soupsieve)

Patch available: facelessuser/soupsieve 2.8.4 (contains commit 28108ab80581)

https://github.com/facelessuser/soupsieve/commit/28108ab805818c832d9568142a99844fd95a0d39

Vendor Advisories for CVE-2026-49476(4)

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

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrhoai/odh-workbench-jupyter-trustyai-cpu-py312-rhel9:17870735932026-08-27redhat
redhatpython-rpds-py-main-2026.6.3-1.hum12026-07-01redhat
redhatpython-attrs-main-26.1.0-3.hum12026-06-07redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
soupsieve2.2.1-1 ... 2.8.4-1 (15 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
soupsieve2.3.2-1 ... 2.8.4-1 (11 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
soupsieve2.7-1, 2.7-2, 2.8.1-1, 2.8.3-1, 2.8.4-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
soupsieve2.7-1, 2.7-2, 2.8.1-1, 2.8.3-1
  • every version up to 2.8.4-1: fixed in 2.8.4-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
soupsieve0.4 ... 2.8.3 (51 versions)
  • every version up to 2.8.4: fixed in 2.8.4
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 35× 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 202 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 102 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

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

Related CVEs(same product + same vendor + same CWE)

Same product

3 shown

Debian:11:soupsieve · Debian:12:soupsieve

Frequently asked(5)

What is CVE-2026-49476?
CVE-2026-49476 is a high-severity vulnerability; its CVE record was published on July 9, 2026. Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.8.4, the CSS selector parser in soupsieve allocates unbounded memory when compiling large comma-separated selector lists, allowing an attacker who can supply a crafted selector string to soupsieve.compile()…
When was the CVE record for CVE-2026-49476 published?
The CVE record for CVE-2026-49476 was published on July 9, 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 July 28, 2026; the record at its source may have been updated since.
Is CVE-2026-49476 actively exploited?
CVE-2026-49476 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (49th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-49476?
CVE-2026-49476 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-2026-49476?
A fix for CVE-2026-49476 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-49476 are linked in the Vendor Advisories panel on this page.

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