CVE-2026-102560

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

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

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.6% (49th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 8.6 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-09-29) is not newer than that change (2026-11-11), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — Patch released this week

Also known asEUVD-2026-89105 (ENISA EUVD) · GHSA-9v45-6jmj-gmwr (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
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).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in libsoup. When the permessage-deflate WebSocket extension compresses a very large outgoing message, truncated size calculations used for GByteArray growth could wrap, causing zlib to write past the allocated buffer and resulting in a heap buffer overflow.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

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)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.6% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
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 none (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

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

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). 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.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).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (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.

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 29, 2026

Last Modified

November 11, 2026

Advisory Details (8)

Auto-updated Nov 7, 2026
Patch available. Sources: redhat.
Red HatMentions a patch (unverified)

2543296 – (CVE-2026-102560) CVE-2026-102560 libsoup: libsoup: Heap buffer overflow during outgoing permessage-deflate buffer growth

Affected: Red Hat Enterprise Linux 9

https://bugzilla.redhat.com/show_bug.cgi?id=2543296
Red HatMentions a patch (unverified)

CVE-2026-102560 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-102560
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 10.0 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:93583
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2026:93447
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.6 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:93446
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2026:93445
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2026:83618
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:83384

Patch Availability(9)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibsoup2.4-doc (2.62.1-1ubuntu0.4+esm10) @ bionic2026-11-12ubuntu
redhatlibsoup-0:2.72.0-17.el9_9.62026-11-11redhat
redhatlibsoup3-0:3.6.6-1.el10_3.92026-11-11redhat
redhatlibsoup-0:2.72.0-8.el9_2.182026-11-02redhat
redhatlibsoup3-0:3.6.5-3.el10_0.192026-11-02redhat
redhatlibsoup-0:2.72.0-8.el9_4.172026-11-02redhat
redhatlibsoup-0:2.72.0-10.el9_6.142026-11-02redhat
redhatlibsoup3-0:3.6.5-3.el10_2.202026-10-15redhat
redhatlibsoup-0:2.72.0-16.el9_8.82026-10-15redhat

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 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
libsoup2.42.74.3-1 ... 2.74.3-9 (16 versions)
  • every version on: no fix on record
—
libsoup33.2.2-2 ... 3.8.0-3 (38 versions)
  • every version on: no fix on record
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
libsoup2.42.74.3-10.1, 2.74.3-11
  • every version on: no fix on record
—
libsoup33.6.5-3 ... 3.8.0-3 (11 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libsoup33.6.5-3 ... 3.6.6-1 (8 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Additional Vendor Advisories

(5)

Data Freshness Timeline

(refreshed 26× in last 7d / 119× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 228 rows 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 128 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  2. 2026-11-13 10:36 UTCEchelonGraph re-scored
  3. 2026-11-13 10:36 UTCVendor advisory
  4. 2026-11-13 10:36 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  5. 2026-11-12 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  6. 2026-11-12 11:55 UTCEchelonGraph re-scored
  7. 2026-11-12 11:55 UTCVendor advisory
  8. 2026-11-12 11:55 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  9. 2026-11-11 16:37 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  10. 2026-11-11 13:28 UTCVendor advisory
  11. 2026-11-11 13:27 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  12. 2026-11-11 12:54 UTCVendor advisory
  13. 2026-11-11 12:54 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  14. 2026-11-11 12:24 UTCEchelonGraph re-scored
  15. 2026-11-11 12:24 UTCVendor advisory
  16. 2026-11-11 12:24 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  17. 2026-11-11 11:45 UTCEchelonGraph re-scored
  18. 2026-11-11 11:45 UTCVendor advisory
  19. 2026-11-11 11:45 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  20. 2026-11-10 16:41 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  21. 2026-11-10 13:17 UTCEchelonGraph re-scored
  22. 2026-11-10 13:17 UTCVendor advisory
  23. 2026-11-10 13:17 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  24. 2026-11-09 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  25. 2026-11-09 14:48 UTCEchelonGraph re-scored
Show 75 more
  1. 2026-11-09 14:48 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  2. 2026-11-08 16:37 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  3. 2026-11-08 16:20 UTCVendor advisory
  4. 2026-11-08 16:20 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  5. 2026-11-07 17:48 UTCEchelonGraph re-scored
  6. 2026-11-07 17:48 UTCVendor advisory
  7. 2026-11-07 17:48 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  8. 2026-11-07 16:37 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  9. 2026-11-06 19:21 UTCEchelonGraph re-scored
  10. 2026-11-06 19:21 UTCVendor advisory
  11. 2026-11-06 19:21 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  12. 2026-11-06 16:35 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  13. 2026-11-05 21:55 UTCOSV refresh
  14. 2026-11-05 20:54 UTCEchelonGraph re-scored
  15. 2026-11-05 20:54 UTCVendor advisory
  16. 2026-11-05 20:54 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  17. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  18. 2026-11-04 22:27 UTCVendor advisory
  19. 2026-11-04 22:27 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  20. 2026-11-04 21:51 UTCEchelonGraph re-scored
  21. 2026-11-04 21:51 UTCVendor advisory
  22. 2026-11-04 21:51 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  23. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  24. 2026-11-04 06:22 UTCEchelonGraph re-scored
  25. 2026-11-04 06:22 UTCVendor advisory
  26. 2026-11-04 06:22 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  27. 2026-11-03 16:45 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  28. 2026-11-03 07:54 UTCEchelonGraph re-scored
  29. 2026-11-03 07:54 UTCVendor advisory
  30. 2026-11-03 07:54 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  31. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  32. 2026-11-02 09:27 UTCVendor advisory
  33. 2026-11-02 09:27 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  34. 2026-11-02 06:26 UTCVendor advisory
  35. 2026-11-02 06:26 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  36. 2026-11-02 05:17 UTCVendor advisory
  37. 2026-11-02 05:17 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  38. 2026-11-02 03:27 UTCVendor advisory
  39. 2026-11-02 03:27 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  40. 2026-11-02 02:42 UTCVendor advisory
  41. 2026-11-02 02:42 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  42. 2026-11-02 02:38 UTCEchelonGraph re-scored
  43. 2026-11-02 02:38 UTCVendor advisory
  44. 2026-11-02 02:38 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  45. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  46. 2026-11-01 06:39 UTCEchelonGraph re-scored
  47. 2026-11-01 06:39 UTCVendor advisory
  48. 2026-11-01 06:39 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  49. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  50. 2026-10-31 08:11 UTCEchelonGraph re-scored
  51. 2026-10-31 08:11 UTCVendor advisory
  52. 2026-10-31 08:11 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  53. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  54. 2026-10-30 09:43 UTCEchelonGraph re-scored
  55. 2026-10-30 09:43 UTCVendor advisory
  56. 2026-10-30 09:43 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  57. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  58. 2026-10-29 11:16 UTCEchelonGraph re-scored
  59. 2026-10-29 11:16 UTCVendor advisory
  60. 2026-10-29 11:16 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  61. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  62. 2026-10-28 12:46 UTCEchelonGraph re-scored
  63. 2026-10-28 12:46 UTCVendor advisory
  64. 2026-10-28 12:46 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  65. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  66. 2026-10-27 14:19 UTCEchelonGraph re-scored
  67. 2026-10-27 14:19 UTCVendor advisory
  68. 2026-10-27 14:19 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  69. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  70. 2026-10-26 15:31 UTCVendor advisory
  71. 2026-10-26 15:31 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  72. 2026-10-25 16:36 UTCEchelonGraph re-scored
  73. 2026-10-25 16:36 UTCVendor advisory
  74. 2026-10-25 16:35 UTCGHSA enrichmentGHSA-9v45-6jmj-gmwr · GitHub severity HIGH · GitHub CVSS 8.6
  75. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile

Frequently asked(5)

What is CVE-2026-102560?
CVE-2026-102560 is a critical-severity vulnerability; its CVE record was published on September 29, 2026. A flaw was found in libsoup. When the permessage-deflate WebSocket extension compresses a very large outgoing message, truncated size calculations used for GByteArray growth could wrap, causing zlib to write past the allocated buffer and resulting in a heap buffer overflow.
When was CVE-2026-102560 made public?
CVE-2026-102560 was made public on September 3, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on September 29, 2026. EchelonGraph's copy of the record carries a last-modified date of November 11, 2026; the record at its source may have been updated since.
Is CVE-2026-102560 actively exploited?
CVE-2026-102560 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-2026-102560?
CVE-2026-102560 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-102560?
A fix for CVE-2026-102560 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-102560 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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