CVE-2026-57073

CRITICALPre-NVD 9.19.1
EchelonGraph scoreMEDIUM confidence

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

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-16. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan mitigationRemediate 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: 0.7%CVSS: 9.1Exploit: None knownExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

HTML::Bare versions through 0.04 for Perl have an unbounded character lookahead.

The parserc_parse function attempts to check for multicharacter strings such as "" without checking that the offsets are within the buffer.

Truncated strings such as "

Note that the latest version available on CPAN is version 0.02. Newer versions are available on the git repository.

EG Risk
56
EG Risk 56/100

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)
Severity91% × 45%
Impact severity (EG Severity): CVSS 9.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.7% × 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 total (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 referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low or medium mission impact and sooner than that at high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

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

The EG score (9.1): severity, escalated by confirmed exploitation. This CVE's 9.1 is its impact severity (EG Severity), not escalated.

EG Severity
9.1 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.7% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-18). 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: 3 days if the affected system is publicly exposed; 60 days 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 low or medium mission impact; Attend at high (mission-essential systems).

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low or medium mission impact and sooner than that at high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (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)3 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 total (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 16, 2026

Last Modified

July 17, 2026

Advisory Details (4)

Auto-updated Sep 16, 2026
Fix referenced — no release confirmed yet. Sources: github_pr.
Web page

oss-security - CVE-2026-57073: HTML::Bare versions through 0.04 for Perl have an unbounded character lookahead

http://www.openwall.com/lists/oss-security/2026/07/16/3
GitHub pull request

HTML::Bare: bounds truncated fixed-advance lookahead (heap OOB read)

Upstream fix in progress (PR #2 · nanoscopic/perl-HTML-Bare, state=open)

https://github.com/nanoscopic/perl-HTML-Bare/pull/2

Vendor Advisories for CVE-2026-57073(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 19× in last 7d / 59× 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 753 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 653 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  2. 2026-10-19 14:14 UTCEG score recompute
  3. 2026-10-19 14:14 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  4. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  5. 2026-10-18 14:23 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  6. 2026-10-18 03:29 UTCEG score recompute
  7. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  8. 2026-10-17 14:33 UTCEG score recompute
  9. 2026-10-17 14:33 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  10. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  11. 2026-10-16 14:43 UTCEG score recompute
  12. 2026-10-16 14:42 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  13. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  14. 2026-10-15 14:50 UTCEG score recompute
  15. 2026-10-15 14:50 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  16. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  17. 2026-10-14 09:19 UTCEG score recompute
  18. 2026-10-14 09:19 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  19. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  20. 2026-10-13 06:41 UTCEG score recompute
  21. 2026-10-13 06:41 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  22. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  23. 2026-10-12 15:54 UTCEG score recompute
  24. 2026-10-12 06:48 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  25. 2026-10-11 19:37 UTCEG score recompute
Show 75 more
  1. 2026-10-11 16:53 UTCEG score recompute
  2. 2026-10-11 14:15 UTCEG score recompute
  3. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  4. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  5. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  6. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  7. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  8. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  9. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  10. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  11. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  12. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  13. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  14. 2026-10-01 15:54 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  15. 2026-10-01 11:23 UTCEG score recompute
  16. 2026-10-01 11:23 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  17. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  18. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  19. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  20. 2026-09-28 13:14 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  21. 2026-09-28 08:18 UTCEG score recompute
  22. 2026-09-28 08:17 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  23. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  24. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  25. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  26. 2026-09-24 13:17 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  27. 2026-09-24 08:29 UTCEG score recompute
  28. 2026-09-24 08:29 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  29. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  30. 2026-09-23 11:39 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  31. 2026-09-23 07:18 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  32. 2026-09-23 03:02 UTCEG score recompute
  33. 2026-09-23 03:02 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  34. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  35. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  36. 2026-09-18 09:57 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  37. 2026-09-18 04:38 UTCEG score recompute
  38. 2026-09-18 04:38 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  39. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  40. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  41. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  42. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  43. 2026-09-14 11:59 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  44. 2026-09-14 07:41 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  45. 2026-09-14 03:25 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  46. 2026-09-13 23:09 UTCEG score recompute
  47. 2026-09-13 23:09 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  48. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  49. 2026-09-13 16:24 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  50. 2026-09-13 11:47 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  51. 2026-09-13 07:08 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  52. 2026-09-12 17:00 UTCEG score recompute
  53. 2026-09-12 17:00 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  54. 2026-09-12 12:43 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  55. 2026-09-12 07:25 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  56. 2026-09-12 01:56 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  57. 2026-09-11 21:40 UTCEG score recompute
  58. 2026-09-11 21:40 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  59. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  60. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  61. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  62. 2026-09-08 00:29 UTCEG score recompute
  63. 2026-09-08 00:29 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  64. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  65. 2026-09-06 17:42 UTCEG score recompute
  66. 2026-09-06 17:42 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  67. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  68. 2026-09-06 13:26 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  69. 2026-09-06 05:51 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  70. 2026-09-06 01:29 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  71. 2026-09-05 20:38 UTCEG score recompute
  72. 2026-09-05 20:37 UTCGHSA enrichmentGHSA-682p-jxjc-9j4v · GitHub severity CRITICAL · GitHub CVSS 9.1
  73. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  74. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  75. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.7% · 48th percentile

Frequently asked(5)

What is CVE-2026-57073?
CVE-2026-57073 is a critical-severity vulnerability; its CVE record was published on July 16, 2026. HTML::Bare versions through 0.04 for Perl have an unbounded character lookahead. The parserc_parse function attempts to check for multicharacter strings such as "<![CDATA" or element terminators such as ">" without checking that the offsets are within the buffer. Truncated strings such as "<a/" can…
When was the CVE record for CVE-2026-57073 published?
The CVE record for CVE-2026-57073 was published on July 16, 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 17, 2026; the record at its source may have been updated since.
Is CVE-2026-57073 actively exploited?
CVE-2026-57073 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (50th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-57073?
CVE-2026-57073 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-57073?
A fix for CVE-2026-57073 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-57073 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-57073

Explore →

Is Your Infrastructure Affected by CVE-2026-57073?

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