CVE-2026-1757

MEDIUMNVD 6.26.2
EchelonGraph scoreMEDIUM confidence

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

Score 6.2 from GitHub Security Advisory published 2026-02-02. NVD baseline CVSS 6.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
6.2EG
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: 0.2%CVSS: 6.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was identified in the interactive shell of the xmllint utility, part of the libxml2 project, where memory allocated for user input is not properly released under certain conditions. When a user submits input consisting only of whitespace, the program skips command execution but fails to free the allocated buffer. Repeating this action causes memory to continuously accumulate. Over time, this can exhaust system memory and terminate the xmllint process, creating a denial-of-service condition on the local system.

CVSS v3
6.2
EG Score
6.2MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100

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)
Severity62% × 45%
Impact severity (EG Severity): CVSS 6.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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
0.2%
EPSS %ILE
11th
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 (6.2): severity, escalated by confirmed exploitation. This CVE's 6.2 is its impact severity (EG Severity), not escalated.

EG Severity
6.2 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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 every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

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

February 2, 2026

Last Modified

September 1, 2026

Advisory Details (4)

Auto-updated Aug 7, 2026
Patch available. Sources: redhat.
Web page

(CVE-2026-1757) Memory leak in xmllint Shell - shell.c (#1009) · Issues · GNOME / libxml2 · GitLab

https://gitlab.gnome.org/GNOME/libxml2/-/issues/1009
Red Hat

2435940 – (CVE-2026-1757) CVE-2026-1757 libxml2: Memory Leak Leading to Local Denial of Service in xmllint Interactive Shell

https://bugzilla.redhat.com/show_bug.cgi?id=2435940
Red HatMentions a patch (unverified)

CVE-2026-1757 - 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-2026-1757
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:7519

Vendor Advisories for CVE-2026-1757(1)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython3-libxml2 (2.15.2+dfsg-0.1ubuntu0.1) @ resolute2026-08-21ubuntu
redhatlibxml2-main-2.15.2-0.3.hum12026-04-10redhat

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
libxml22.9.10+dfsg-6.7 ... 2.9.10+dfsg-6.7+deb11u9 (10 versions)
  • every version up to 2.9.10+dfsg-6.7+deb11u10: fixed in 2.9.10+dfsg-6.7+deb11u10
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libxml22.9.14+dfsg-1.2 ... 2.9.14+dfsg-1.3~deb12u5 (6 versions)
  • every version up to 2.9.14+dfsg-1.3~deb12u6: fixed in 2.9.14+dfsg-1.3~deb12u6
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libxml22.12.7+dfsg+really2.9.14-2.1, 2.12.7+dfsg+really2.9.14-2.1+deb13u1, 2.12.7+dfsg+really2.9.14-2.1+deb13u2
  • every version up to 2.12.7+dfsg+really2.9.14-2.1+deb13u3: fixed in 2.12.7+dfsg+really2.9.14-2.1+deb13u3
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libxml22.12.7+dfsg+really2.9.14-2.1 ... 2.15.1+dfsg-2 (25 versions)
  • every version up to 2.15.2+dfsg-0.1: fixed in 2.15.2+dfsg-0.1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 29× 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 223 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 123 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-10-18 03:59 UTCEG score recompute
  3. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  4. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  5. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  6. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  7. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  8. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  9. 2026-10-12 16:28 UTCEG score recompute
  10. 2026-10-11 20:08 UTCEG score recompute
  11. 2026-10-11 17:21 UTCEG score recompute
  12. 2026-10-11 14:53 UTCEG score recompute
  13. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-10-10 00:55 UTCOSV refresh
  16. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  17. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  21. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  22. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  23. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-09-29 15:21 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  25. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 9th percentile
Show 75 more
  1. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  2. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  3. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  4. 2026-09-24 14:03 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  5. 2026-09-20 09:03 UTCOSV refresh
  6. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  7. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  8. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  9. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  10. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  11. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  12. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  13. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  14. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  15. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  16. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  17. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  18. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  19. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  20. 2026-09-01 12:28 UTCVendor advisory
  21. 2026-09-01 12:27 UTCGHSA enrichmentGHSA-7qq5-wfv8-hvvh · GitHub CVSS 6.2
  22. 2026-09-01 12:02 UTCEG score recompute
  23. 2026-09-01 12:02 UTCVendor advisory
  24. 2026-09-01 12:02 UTCGHSA enrichmentGHSA-7qq5-wfv8-hvvh · GitHub CVSS 6.2
  25. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  26. 2026-08-31 16:43 UTCEG score recompute
  27. 2026-08-31 16:43 UTCVendor advisory
  28. 2026-08-31 16:43 UTCGHSA enrichmentGHSA-7qq5-wfv8-hvvh · GitHub CVSS 6.2
  29. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  30. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  31. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  32. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  33. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  34. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  35. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  36. 2026-08-21 12:20 UTCVendor advisory
  37. 2026-08-21 12:20 UTCGHSA enrichmentGHSA-7qq5-wfv8-hvvh · GitHub CVSS 6.2
  38. 2026-08-21 12:15 UTCEG score recompute
  39. 2026-08-21 12:15 UTCVendor advisory
  40. 2026-08-21 12:15 UTCGHSA enrichmentGHSA-7qq5-wfv8-hvvh · GitHub CVSS 6.2
  41. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  42. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  43. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  44. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  45. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  46. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  47. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  48. 2026-08-14 11:42 UTCEG score recompute
  49. 2026-08-14 11:42 UTCVendor advisory
  50. 2026-08-14 11:42 UTCGHSA enrichmentGHSA-7qq5-wfv8-hvvh · GitHub CVSS 6.2
  51. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  52. 2026-08-13 03:52 UTCEG score recompute
  53. 2026-08-13 03:52 UTCVendor advisory
  54. 2026-08-13 03:52 UTCGHSA enrichmentGHSA-7qq5-wfv8-hvvh · GitHub CVSS 6.2
  55. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  56. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  57. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  58. 2026-08-09 16:12 UTCEG score recompute
  59. 2026-08-09 16:12 UTCVendor advisory
  60. 2026-08-09 16:12 UTCGHSA enrichmentGHSA-7qq5-wfv8-hvvh · GitHub CVSS 6.2
  61. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  62. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  63. 2026-08-07 23:03 UTCEG score recompute
  64. 2026-08-07 23:03 UTCVendor advisory
  65. 2026-08-07 23:03 UTCGHSA enrichmentGHSA-7qq5-wfv8-hvvh · GitHub CVSS 6.2
  66. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  67. 2026-08-06 04:34 UTCEG score recompute
  68. 2026-08-06 04:34 UTCVendor advisory
  69. 2026-08-06 04:34 UTCGHSA enrichmentGHSA-7qq5-wfv8-hvvh · GitHub CVSS 6.2
  70. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  71. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  72. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  73. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  74. 2026-08-02 21:43 UTCEG score recompute
  75. 2026-08-02 21:43 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-1757?
CVE-2026-1757 is a medium-severity vulnerability; its CVE record was published on February 2, 2026. A flaw was identified in the interactive shell of the xmllint utility, part of the libxml2 project, where memory allocated for user input is not properly released under certain conditions. When a user submits input consisting only of whitespace, the program skips command execution but fails to free…
When was CVE-2026-1757 made public?
CVE-2026-1757 was made public on February 2, 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 February 2, 2026. EchelonGraph's copy of the record carries a last-modified date of September 1, 2026; the record at its source may have been updated since.
Is CVE-2026-1757 actively exploited?
CVE-2026-1757 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (11th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-1757?
CVE-2026-1757 has a CVSS v3 base score of 6.2 (NVD).
How do I remediate CVE-2026-1757?
A fix for CVE-2026-1757 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-1757 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-1757

Explore →

Is Your Infrastructure Affected by CVE-2026-1757?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.